(8) Bind them [these words] as a sign on your hand and let them serve as a symbol on your forehead [literally "between your eyes"];

Upon wrapping oneself in ritual fringes, one should recite: Blessed…Who has made us holy through Divine commandments and has commanded us to wrap ourselves in a garment with ritual fringes. Upon donning one's phylacteries on one's arm, one should recite: Blessed…Who has made us holy through Divine commandments and has commanded us to don phylacteries.
Upon donning phylacteries on one's head one should recite: Blessed…Who has made us holy through Divine commandments and has commanded us with regard to the mitzva of phylacteries.

The Sages taught in a baraita: If one forgot that one was donning phylacteries and engaged in relations with their phylacteries in place, one may grip neither the strap nor the box until one washes their hands, and only then may one remove the phylacteries. This is because the hands are active and tend to inadvertently touch parts of the body that are unclean.

Rav Naḥman said: May I receive my reward because I fulfilled the obligation to eat three meals on Shabbat magnificently. Rav Yehuda said: May I receive my reward because I fulfilled the obligation of consideration during prayer. Rav Huna, son of Rav Yehoshua, said: May I receive my reward because I never walked four cubits with my head uncovered. Rav Sheshet said: May I receive my reward because I fulfilled the mitzva of phylacteries magnificently. And Rav Naḥman said: May I receive my reward because I fulfilled the mitzva of ritual fringes magnificently.

And from that which transpired to Rav Naḥman bar Yitzḥak as well it can be derived that there is no constellation for the Jewish people, As Chaldean astrologers told Rav Naḥman bar Yitzḥak’s mother: Your son will be a thief. She did not allow him to uncover his head. She said to her son: Cover your head so that the fear of Heaven will be upon you, and pray for Divine mercy. He did not know why she said this to him. One day he was sitting and studying beneath a palm tree that did not belong to him, and the cloak fell off of his head. He lifted his eyes and saw the palm tree. He was overcome by impulse and he climbed up and detached a bunch of dates with his teeth. Apparently, he had an inborn inclination to steal, but was able to overcome that inclination with proper education and prayer.

The Gemara cites another incident involving honor one demonstrates for his teacher. Once, when Ravina was sitting before Rabbi Yirmeya of Difti, a certain man passed before him and did not cover his head. Ravina said: How rude is this man, who does not show respect by covering his head in honor of a rabbi. Rabbi Yirmeya of Difti said to him: Perhaps he is from the city of Mata Meḥasya, where rabbis are common and the people living there are consequently not as careful to display honor as those in other places.

A minor may read in the Torah and translate it, but he may not read the parts of the Shema‘ by reciting ‘Who formest light’; nor may he stand before the reading-desk, nor lift up his hands. A poḥeaḥ, that is one whose knees are exposed or whose clothes are torn, or one whose head is uncovered, may read the parts of the Shema‘. Others say that if a person’s knees [are exposed] or his clothes torn he may read the parts of the Shema‘, but one may not do so when his head is uncovered, since it is not permitted to utter the divine names [with uncovered head]. In either case he may translate, but not read in the Torah, nor stand before the reading-desk, nor lift up his hands.

(6) Torah Sages conduct themselves with exceptional modesty. They do not demean themselves and do not bare their heads or their bodies.
Even when one enters a latrine, he should be modest and not uncover himself until he is seated. He should not wipe himself clean with the right hand. He should stay away from all others and enter a chamber beyond a chamber, a cave within a cave, and relieve himself. If he [must] relieve himself behind a fence, he should move far enough away that no one can hear the sound if he breaks wind. If he [must] relieve himself in an open area, he should be far enough off so that no one can see him baring himself.
One should not speak while relieving himself, even if there is great need. Just as he conducts himself with modesty while in the latrine by day, he should [also] do so at night.
One should always train himself to relieve himself in the early morning and after dark only, so that he [need] not go far off.

(5) Proper clothing: What is implied?
One should adjust his clothing and make himself neat and presentable before [praying], as [implied by Psalms 29:2]: "They bow to God in resplendent holiness."
One should not pray wearing [only] his undershirt, bareheaded, or barefoot - if it is the custom of the people of that place to stand before their most respected people with shoes.
In all places, one should not hold tefillin in his hand or a Sefer Torah in his arms during the Amidah, since he will worry about them. [Similarly,] one should not hold utensils or money in his hand. However, he may pray while holding his lulav on Sukkot, since it is the commandment of the day.
If one is carrying a burden of less than four kabbim on his head when the time for the Amidah arrives, he should throw it over his shoulder and pray. If it is larger than four kabbim, he should place it on the ground and then pray.
It is customary for all Sages and their students to pray only when wrapped in a tallit.

(6) It is forbidden to walk in an [overly] upright posture, and one should not walk [a distance of] four amot with the head uncovered (out of respect for the Divine Presence), and one should examine one's orifices [to ensure they are kept clean]. Rem"a: And one should cover his entire body, and should not go barefoot (Or Zarua). And One should accustom oneself to relieve oneself morning and evening, which is [included in the virtues of] alacrity and cleanliness (Hagahot Maimoni Chap 5 of Hilchot Deot).

§ And Rav Ḥananel says that Rav says: The requirement to have the titora of phylacteries, i.e., the base of phylacteries upon which the compartments rest, is a halakha transmitted to Moses from Sinai. Abaye said: The requirement to have the ma’ebarta of phylacteries, i.e., the passageway through which the straps are inserted, is a halakha transmitted to Moses from Sinai. And Abaye says: The requirement to have a letter shin protruding on the phylacteries of one’s head, which is achieved by pressing the hide into the shape of that letter, is a halakha transmitted to Moses from Sinai.Abaye further says: And there is a requirement that the furrow between each of the compartments of phylacteries of the head reach the place of the stitches, i.e., the titora, to which the compartments are sewn. Rav Dimi of Neharde’a says: Once it is noticeable that there is a furrow between each of the compartments, it is not necessary for them to reach all the way to the titora. And Abaye says: With regard to this parchment upon which one writes the passages of phylacteries, the scribe must examine it before writing, as perhaps it has a flaw, i.e., a perforation, and complete writing is required, and that requirement would not be fulfilled if a letter were perforated. Rav Dimi of Neharde’a says: No prior examination is required; rather, the quill examines it as one writes, as any perforation which the ink covers is disregarded. Rabbi Yitzḥak says: The requirement that the straps of the phylacteries be black is a halakha transmitted to Moses from Sinai. The Gemara raises an objection from a baraita: One may tie phylacteries only with straps of their same type, i.e., the straps must be made from hide, and it does not matter whether they are green, or black, or white. Nevertheless, one should not make red straps, because this is deprecatory to him, as it looks like he has wounds on his head, and also due to something else, i.e., lest people suspect him of engaging in sexual intercourse with a menstruating woman and getting blood on the straps. The Gemara cites the continuation of that baraita. Rabbi Yehuda said: There was an incident involving Rabbi Akiva’s student, who would tie his phylacteries with strips of sky-blue wool rather than hide, and Rabbi Akiva did not say anything to him. Is it possible that that righteous man saw his student doing something improper and he did not object to his conduct? Another Sage said to Rabbi Yehuda: Yes, it is possible that the student acted improperly, as Rabbi Akiva did not see him, and if he had seen him, he would not have allowed him to do so. The baraita continues: There was an incident involving Hyrcanus, the son of Rabbi Eliezer ben Hyrcanus, who would tie his phylacteries with strips of purple wool, and his father did not say anything to him. Is it possible that that righteous man saw his son doing something improper and he did not object to his conduct? The Sages said to him: Yes, it is possible that his son acted improperly, as Rabbi Eliezer did not see him, and if he had seen him, he would not have allowed him to do so. This concludes the baraita. The Gemara explains the objection from the baraita: In any event, the baraitateaches that it does not matter whether the straps are green, or black, or white, whereas Rabbi Yitzḥak maintains that it is a halakha transmitted to Moses from Sinai that the straps of the phylacteries must be black. The Gemara answers that it is not difficult. Here, the baraita is referring to the inside of the straps, which touch the body. These may be any color other than red. Conversely, there, when Rabbi Yitzḥak says that the straps of the phylacteries must be black, he is speaking of the outside of the straps. The Gemara raises a difficulty: If the baraita is discussing the inside of the straps, what deprecatory matter or problem of something else is there with straps that are red on the inside? After all, this side is not seen. The Gemara answers: Sometimes his straps become reversed, and therefore these concerns are applicable. It is taught in a baraita: The requirement that phylacteries be square is a halakha transmitted to Moses from Sinai. Rav Pappa says about this halakha: Square means along their seams and their diagonals, i.e., they must be perfectly square where the compartments are sewn to the titora. The Gemara suggests: Let us say that a mishna supports this opinion (Megilla 24b): One who fashions his phylacteries in a round shape exposes himself to danger, and it does not enable him to fulfill the mitzva of phylacteries. Rav Pappa said: This is no support, as one can say that the mishna is referring to phylacteries that are fashioned like a nut, i.e., their underside is rounded, and therefore there is a danger that if he strikes his head on a wall the underside will press into his head and injure him. By contrast, if the underside is flat one might have thought that it is fit despite the fact that it is not square. Therefore, the baraita teaches that phylacteries must be square. § Rav Huna says: With regard to phylacteries of the head, as long as the surface of outer hide is intact, i.e., it is not torn, they are fit, even if the hide between the compartments has torn. Rav Ḥisda says: If two of the walls between the compartments tore, such phylacteries are fit, but if three of these inner walls tore, they are unfit.Rava said: Concerning that which you said, that if two of the walls between the compartments tore they are fit, we said this only if the inner walls that tore are not aligned with each other, i.e., they are not adjacent to one another. But if the torn walls are aligned with each other, the phylacteries are unfit. And furthermore, even in a case where the torn walls are aligned with each other, we said that they are unfit only with regard to new phylacteries, as the hide is certainly defective. But with regard to old phylacteries, we have no problem with it, as they tore due to aging. Abaye said to Rav Yosef: What are the circumstances of new phylacteries, and what are the circumstances of old phylacteries? Rav Yosef said to him: In any case where if one holds the hide and pulls it, it returns to its place [ḥaleim], these phylacteries are considered old; and in the other case, where hide that was pulled does not return to its place, they are considered new.Alternatively, in any case where if the phylacteries are hanging by the strap the compartment follows the strap, i.e., it remains attached, these phylacteries are considered new; and in the other case, where the phylacteries would fall off, they are considered old.§ The Gemara relates: Abaye was sitting before Rav Yosef when the strap of his phylacteries tore. Abaye said to Rav Yosef: What is the halakha as to whether one may tie the strap? Rav Yosef said to him: It is written with regard to phylacteries: “And you shall bind them [ukshartam] for a sign upon your arm” (Deuteronomy 6:8), which teaches that the binding must be complete [keshira tamma], whole and beautiful, and that would not be the case with a makeshift knot. Rav Aḥa, son of Rav Yosef, said to Rav Ashi: What is the halakha as to whether one may sew a strap that tore and insert the stitching inside, so that it is not visible from the outside? Rav Ashi said to him: Go out and see what the people are doing. If the common custom is to do this, it is permitted. Rav Pappa says: The remnants of straps, i.e., what remains when part of the strap has been cut off, are fit. The Gemara comments: And it is not so, as can be derived from the fact that the sons of Rabbi Ḥiyya say: The remnants of the sky-blue wool of ritual fringes, when only a small thread remains, and likewise the remnants of the hyssop, used for the sprinkling of the purification water of the red heifer, are fit. They did not include the remnants of straps of phylacteries in this halakha. The reason for this difference is that it is there that the remnants are fit, as they are mere articles used in the performance of a mitzva; but here, phylacteries are articles of sanctity, which are of greater sanctity, and therefore their remnants are not fit. The Gemara states: From this line of inquiry one can conclude by inference that the straps of phylacteries have a minimum requisite measure. And how much is their measure? Rami bar Ḥama says that Reish Lakish says: It is until the index finger. In explanation of this size, Rav Kahana would demonstrate a bowed measure, i.e., from the tip of the middle finger until the tip of the index finger, with the fingers spread. Rav Ashi would demonstrate a straight measure, from the tip of the thumb until the tip of the index finger, with the fingers spread. The Gemara relates: Rabba would tie the straps and release them and let them fall behind him. Rav Aḥa bar Ya’akov would tie them and plait them together like a braid. Mar, son of Rabbana, would act like we do, i.e., he would let the straps fall and hang over the front of his body. Rav Yehuda, son of Rav Shmuel bar Sheilat, says in the name of Rav: The form of the knot of phylacteries, i.e., that there must be the form of a letter dalet in the knot of the phylacteries of the head and the letter yod in the knot of the phylacteries of the arm, is a halakha transmitted to Moses from Sinai. Rav Naḥman says: And their decorative side, the black side of the knot where the shape of the letter is visible, must face outward. The Gemara relates: Rav Ashi was sitting before Mar Zutra when the strap of his phylacteries became reversed. Mar Zutra said to him: Doesn’t the Master hold in accordance with the ruling that their decorative side must face outward? Rav Ashi said to him: It did not enter my mind, i.e., I did not notice. With regard to the verse: “And all the nations of the land shall see that the name of the Lord is called upon you, and they shall be afraid of you” (Deuteronomy 28:10), it is taught in a baraita that Rabbi Eliezer the Great says: This is a reference to the phylacteries of the head, upon which the name of God is written, as they demonstrate to all that the name of God is called upon the Jewish people. With regard to the statement of God to Moses: “And I will remove My hand, and you will see My back” (Exodus 33:23), Rav Ḥana bar Bizna says that Rabbi Shimon Ḥasida says: This teaches that the Holy One, Blessed be He, showed Moses the knot of the phylacteries of the head. Rav Yehuda says: The knot of phylacteries must be above, i.e., it must rest on the head rather than on the neck, in order that the Jewish people should be above and not below. And likewise it must be placed toward the front [panim], i.e., not on the sides of the head, in order that the Jewish people should be in front [lefanim] and not behind.§ Rav Shmuel bar Bideri says that Rav says, and some say that Rabbi Aḥa Arikha, i.e., Rabbi Aḥa the Tall, says that Rav Huna says, and some say that Rav Menashya says that Shmuel says: With regard to phylacteries, from when does one recite a blessing over them? From the time when one dons them on the arm and onward. The Gemara raises a difficulty: Is that so? But doesn’t Rav Yehuda say that Shmuel says: With regard to all the mitzvot, one recites a blessing over them prior to their performance? How, then, can one recite a blessing over phylacteries after donning them? Abaye and Rava both say: One recites the blessing from the time of donning the phylacteries until the time of binding them, as the binding constitutes the performance of the mitzva. § Rav Ḥisda says: If one spoke between donning the phylacteries of the arm and the phylacteries of the head, he must recite the blessing again when donning the phylacteries of the head. The Gemara notes: One can infer that if he spoke, yes, he must recite a blessing when donning the phylacteries of the head, but if he did not speak, he does not recite a blessing. The Gemara challenges this: But Rav Ḥiyya, son of Rav Huna, sent a ruling in the name of Rabbi Yoḥanan: On the phylacteries of the arm one says the blessing: Blessed are You, Lord our God, King of the Universe, Who has sanctified us through His mitzvot and commanded us to don phylacteries. On the phylacteries of the head one says the blessing: Blessed are You, Lord our God, King of the Universe, Who has sanctified us through His mitzvot and commanded us concerning the mitzva of phylacteries. This indicates that one always recites a blessing when donning the phylacteries of the head. Abaye and Rava both say, to resolve this apparent contradiction: Rabbi Yoḥanan meant that if one did not speak, he recites one blessing; if he spoke, he recites two blessings, when donning the phylacteries of the head as well as when donning the phylacteries of the arm. Concerning this, it is taught in a baraita: If one spoke between donning the phylacteries of the arm and the phylacteries of the head, he has a sin, and due to that sin he returns from the ranks of soldiers waging war. This is referring to the preparation for war, when the officers announce: “What man is there who is fearful and fainthearted? Let him go and return to his house” (Deuteronomy 20:8). The Sages explained that this is referring to one who is fearful due to his transgressions. It is further taught in a baraita: When one dons phylacteries, he first dons the phylacteries of the arm and afterward dons the phylacteries of the head. And when he removes his phylacteries, he first removes the phylacteries of the head and afterward removes the phylacteries of the arm. The Gemara asks: Granted, the ruling that when one dons phylacteries he first dons the phylacteries of the arm and afterward dons the phylacteries of the head is understood, as it is first written: “And you shall bind them for a sign upon your arm,” and then it is written: “And they shall be for frontlets between your eyes” (Deuteronomy 6:8). But from where do we derive the halakha that when he removes his phylacteries, he first removes the phylacteries of the head and afterward he removes the phylacteries of the arm? Rabba said in explanation: Rav Huna explained to me the source of this halakha. The verse states: “And you shall bind them for a sign upon your arm and they shall be for frontlets between your eyes,” and it is derived from here: As long as the phylacteries of the head are between your eyes, the number of phylacteries you are wearing shall be two.The Sages taught in a baraita: With regard to phylacteries, from when does one recite a blessing over them? From when the time arrives to don them. How so? If one is rising early to leave his home to travel on the road and is afraid lest his phylacteries become lost during the journey, he dons them even at night, despite the fact that this is not the proper time for the mitzva of phylacteries. And when the time for their mitzva arrives, in the morning, he touches them and recites a blessing over them.And until when does one wear them? Until the sun sets. Rabbi Ya’akov says: Until traffic in the marketplace ceases. And the Rabbis say: Until the time of sleep. And the Rabbis concede to Rabbi Ya’akov that if one removed them to go out to the bathroom or to enter the bathhouse and the sun set, one does not don them again.Rav Naḥman says: The halakha is in accordance with the opinion of Rabbi Ya’akov. The Gemara likewise relates that Rav Ḥisda and Rabba bar Rav Huna would pray in the evening, i.e., the evening service, with phylacteries. Some say that Rav Naḥman ruled that the halakha is not in accordance with the opinion of Rabbi Ya’akov but in accordance with the opinion of the first tanna that the mitzva of phylacteries ends at sunset. The Gemara raises a difficulty: But Rav Ḥisda and Rabba bar Rav Huna would pray in the evening with phylacteries. The Gemara explains: That opinion represented in this incident disagrees with the ruling of Rav Naḥman. The Gemara asks: And did Rabba bar Rav Huna actually say this, that the mitzva of phylacteries applies at night? But doesn’t Rabba bar Rav Huna say: If it is uncertain whether it is nightfall or whether it is not nightfall, one neither removes his phylacteries, as it is not yet definitely night, nor dons them ab initio. This indicates that if it is definitely nightfall, one removes his phylacteries. The Gemara answers: Rabba bar Rav Huna’s ruling there was stated with regard to Shabbat eve, as one may not don phylacteries on Shabbat, when the mitzva does not apply. The Gemara raises a difficulty with regard to this answer: What does Rabba bar Rav Huna hold? If he holds that night is a time when one performs the mitzva of wearing phylacteries, then Shabbat is also a time when one performs the mitzva of wearing phylacteries. If he holds that Shabbat is not a time when one performs the mitzva of wearing phylacteries, then night is also not a time when one performs the mitzva of wearing phylacteries. The reason for this statement is that from the source where Shabbat is excluded from the mitzva of phylacteries, nights are excluded from there as well. As it is taught in a baraita with regard to the end of the passage of the Torah that discusses both the mitzvot of the Paschal offering and phylacteries: “And you shall observe this ordinance in its season from year [miyamim] to year” (Exodus 13:10). This indicates that these mitzvot apply during the days [yamim] but not during the nights. Furthermore, the letter mem, meaning from, in the term: “From year [miyamim],” teaches: These mitzvot apply on some days, but not on all days. This excludes Shabbatot and Festivals, on which phylacteries are not worn. This is the statement of Rabbi Yosei HaGelili. Rabbi Akiva says: This verse, mentioning an ordinance, is stated only with regard to the Paschal offering, and it is not referring to phylacteries at all. Evidently, Rabbi Yosei HaGelili, who says that at night one is exempt from the obligation of donning phylacteries, says that on Shabbat one is exempt as well. The Gemara answers: Rabba bar Rav Huna derives the exemption from the obligation to don phylacteries on Shabbat from a different source, the source where Rabbi Akiva derives it from, as it is taught in a baraita that Rabbi Akiva says: One might have thought that a person should don phylacteries on Shabbatot and Festivals. To counter this, the verse states: “And it shall be for a sign for you on your arm, and for a remembrance between your eyes, so that God’s law shall be in your mouth; for with a strong arm God brought you out of Egypt” (Exodus 13:9). This teaches that the obligation to don phylacteries applies when the Jewish people require a sign to assert their status as God’s nation, i.e., during the week. This serves to exclude Shabbatot and Festivals, as they themselves are signs of the Jewish people’s status as God’s nation and a remembrance of the exodus from Egypt. Consequently, no further sign is required on these days. Rabbi Elazar says: Anyone who dons phylacteries after sunset violates a positive mitzva. And Rabbi Yoḥanan says: He violates a prohibition. The Gemara suggests: Let us say that these Sages disagree with regard to the principle that Rabbi Avin says that Rabbi Ile’a says. As Rabbi Avin says that Rabbi Ile’a says: Any place where it is stated in the Torah any of the terms: Observe, or: Lest, or: Do not, this means nothing other than a prohibition, as these are negative terms. The Gemara explains this suggestion: As this Sage, Rabbi Yoḥanan, is of the opinion that the ruling is in accordance with the opinion of Rabbi Avin, and therefore the verse: “And you shall observe this ordinance in its season from year to year,” from which the exclusion of nights is derived, is a prohibition, as it employs the term “observe.” And that Sage, Rabbi Elazar, is of the opinion that the ruling is not in accordance with the opinion of Rabbi Avin, and therefore the term: “And you shall observe,” is a positive mitzva. The Gemara counters: No, everyone is of the opinion that the ruling is in accordance with the opinion that Rabbi Avin says that Rabbi Ile’a says, and here they disagree with regard to this: One Sage, Rabbi Elazar, holds that the term “observe” written with regard to a prohibition has the status of a prohibition, whereas that same term “observe” written with regard to a positive mitzva has the status of a positive mitzva, as the Torah is issuing a warning to take special care in the observance of a mitzva. Accordingly, the command with regard to the positive mitzva of phylacteries is a positive mitzva. And one Sage, Rabbi Yoḥanan, holds that the term “observe” written with regard to a positive mitzva is also a prohibition.And Rabbi Elazar says: And although it is prohibited to don phylacteries at night, if one does so in order to safeguard them from theft and the like, it is permitted. And Ravina said: I was sitting before Rav Ashi and it grew dark, and he donned phylacteries. And I said to him: Does the Master need to safeguard them? And he said to me: Yes. But I saw that his intention in donning them was not that he needed to safeguard them; rather, Rav Ashi holds: This is the halakha, that night is an appropriate time for phylacteries, but a public ruling is not issued to that effect.Rabba bar Rav Huna says: A person is obligated to touch his phylacteries regularly for the entire time that he is wearing them. This is derived from an a fortiori inference from the frontplate of the High Priest, as follows: And if with regard to the frontplate, which has only one mention of God’s name, the Torah states: “And it should be always upon his forehead” (Exodus 28:38), which means that the High Priest must always be aware that the frontplate is placed on his head and that he should not be distracted from it, then with regard to phylacteries, which have numerous mentions of God’s name, all the more so one must always be aware of them. § The Sages taught with regard to the verse: “And it shall be for a sign for you on your arm [yadkha]” (Exodus 13:9), that this is referring to the left arm. Do you say it means the left arm, or is it only the right arm? The verse states: “Even My hand [yadi] has laid the foundation of the earth, and My right hand [vimini] has spread out the heavens” (Isaiah 48:13). And another verse states: “Her hand [yadah] she put to the tent pin, and her right hand [viminah] to the workmen’s hammer” (Judges 5:26), and another verse states: “Why do You withdraw Your hand [yadkha], even Your right hand [viminekha]? Draw it out of Your bosom and consume them” (Psalms 74:11). All these verses employ the term yad with regard to the left hand, and use the term yamin, literally, right, without the term yad, to indicate the right hand. Rabbi Yosei HaḤorem says: This is no proof, as we have found that the right hand is also called yad, as it is stated: “And when Joseph saw that his father was laying his right hand [yad yemino]” (Genesis 48:17). The Gemara asks: And the othertanna, who maintains that the right hand is not called yad, how does he respond to this proof? He maintains that the right hand is called “his right hand [yad yemino],” but it is not called a yad without further specification.Rabbi Natan says: This proof is not necessary, as it says: “And you shall bind them for a sign upon your arm” (Deuteronomy 6:8), and then it states: “And you shall write them upon the doorposts of your house” (Deuteronomy 6:9). This teaches that just as writing is with the right hand, as most people write with their right hands, so too, the binding of phylacteries must be performed with the right hand. And since binding is with the right hand, this means that donning is on the left arm, as one cannot bind the phylacteries with the same hand upon which he is donning them. The Gemara asks: And from where does Rabbi Yosei HaḤorem, who holds that the right hand is also called yad in the Torah, derive that donning phylacteries is on the left arm? The Gemara answers: He derives it from where Rabbi Natan derives it.Rav Ashi said: The requirement that phylacteries be donned on the left arm is derived from the verse: “It shall be for a sign upon your arm [yadkha]” (Exodus 13:16), which is written with a letter heh at the end. This is expounded as though it stated: Your weak [keha] arm. Rabbi Abba said to Rav Ashi: But one can say that yadkha should be interpreted as yadko’aḥ, with a letter ḥet at the end instead of a heh. If so, this would mean: Your arm that is of strength [shebeko’aḥ], which is the right arm. Rav Ashi said to Rabbi Abba: Is this word written with a ḥet?The Gemara notes that Rav Ashi’s opinion, that the halakha that phylacteries are donned on the left arm is derived from the term yadkha, is subject to a dispute between tanna’im, as it is taught in a baraita: Yadkha is written with a heh, indicating weakness, and this is referring to the left arm. Others say: “Your arm,” i.e., yadkha, serves to include one without a complete arm, i.e., one whose arm ends at the elbow, in the obligation to don phylacteries, as the remaining part is also categorized as a weak arm. It is taught in anotherbaraita: If one does not have a left arm, i.e., not even above the elbow, he is exempt from the mitzva of phylacteries. Others say: Yadkha serves to include one without a left arm even above the elbow, teaching that he must don phylacteries on his right arm. The Sages taught in a baraita: A left-handed person dons phylacteries on his right arm, which is equivalent to his left arm, i.e., his weaker arm. The Gemara raises a difficulty: But isn’t it taught in a baraita that a left-handed person dons phylacteries on his left arm, which is the left arm of every other person? Abaye said: When thatbaraitais taught, it is referring to one who has equal control with both his hands, i.e., an ambidextrous person. Since such an individual also uses his right hand, he dons phylacteries on his left arm. The school of Menashe taught with regard to the verse: “And you shall bind them for a sign on your arm, and they shall be as frontlets between your eyes” (Deuteronomy 6:8): “On your arm”; this is the bicep. “Between your eyes”; this is the crown of the head. The Gemara asks: Where exactly on the crown of the head are the phylacteries placed? The school of Rabbi Yannai say: Phylacteries are placed on the place where the bone above the baby’s brain is soft after birth. § The Sage Peleimu raised a dilemma before Rabbi Yehuda HaNasi: In the case of one who has two heads, on which of them does he don phylacteries? Rabbi Yehuda HaNasi said to him: Either get up and exile yourself from here or accept upon yourself excommunication for asking such a ridiculous question. In the meantime, a certain man arrived and said to Rabbi Yehuda HaNasi: A firstborn child has been born to me who has two heads. How much money must I give to the priest for the redemption of the firstborn? A certain elder came and taught him: You are obligated to give him ten sela, the requisite five for each head. The Gemara asks: Is that so? But Rami bar Ḥama teaches: Since it is stated with regard to the redemption of the firstborn: “The firstborn of man you shall redeem” (Numbers 18:15), I would derive that even if he was ravaged, e.g., by an animal, within thirty days of his birth, one should redeem him. To counter this, the verse states:“Yet the firstborn of man you shall redeem”; the addition of the word “yet” serves to differentiate and teach that there is a firstborn who is not redeemed, namely, one that was ravaged. A child with two heads is like one that was ravaged, as he will certainly not live. The Gemara answers: Here it is different, as the Merciful One makes the redemption of the firstborn dependent on his skull, as it is stated: “You shall take five shekels apiece, by the skull” (Numbers 3:47), which indicates that there is a case in which a firstborn with more than one skull must be redeemed. The Gemara returns to its discussion of the baraita: The Master says: “On your arm”; this is the bicep. The term yad can mean either hand or arm. Therefore, the Gemara asks: From where do we derive this? As the Sages taught: “On your arm [yadkha]”; this is the upper part of the arm. Do you say that this is the upper part of the arm, or is it only literally on your actual hand, i.e., on the palm of the hand? The Torah says: Don phylacteries on the yad and don phylacteries on the head; just as there, with regard to the head, it means on the upper part of the head, as will be explained, so too here, it means on the upper part of the arm.Rabbi Eliezer says: This proof is not necessary, as the verse states: “And it shall be for a sign for you upon your arm” (Exodus 13:9), which teaches: It shall be a sign for you, but not a sign for others, i.e., one must don the phylacteries of the arm in a place where they are not seen by others. This is the arm, which is usually covered, whereas the hand is usually visible. Rabbi Yitzḥak says: This proof is not necessary, as the verse states: “Therefore you shall place these words in your heart and in your soul, and you shall bind them” (Deuteronomy 11:18). This teaches that placing the words, i.e., donning the phylacteries, shall be opposite the heart, on the bicep. The Gemara relates: Rabbi Ḥiyya and Rav Aḥa, son of Rav Avya, would direct the placement of his phylacteries of the arm and don them opposite his heart. Rav Ashi was sitting before Ameimar, and there was a cut in the sleeve covering Ameimar’s arm, and as a result his phylacteries were visible, as they were not covered by a garment. Rav Ashi said to Ameimar: Doesn’t the Master hold that the phylacteries shall be a sign for you but not a sign for others? Ameimar said to him: This does not mean that phylacteries must be hidden; rather, this was stated in order to teach that they must be donned in a place that is a sign for you, i.e., the bicep, which is generally not seen, but it does not matter if in practice the phylacteries are visible. With regard to the statement of the baraita that the phylacteries of the head are donned on the upper part of the head, the Gemara asks: From where do we derive this? As the Sages taught: “Between your eyes” (Exodus 13:9); this is the upper part of the head. Do you say that this is the upper part of the head, or is it only literally between your eyes? It is stated here: “Between your eyes,” and it is stated there: “You shall not cut yourselves, nor make any baldness between your eyes for the dead” (Deuteronomy 14:1), Just as there, the phrase “between your eyes” is referring to a place on the upper part of the head, as that is a place where one can render himself bald by removing his hair, so too, the place where phylacteries are donned is on the upper part of the head, a place where one can render himself bald.Rabbi Yehuda says: This proof is not necessary, as the Torah says: Don phylacteries on the arm and don phylacteries on the head. Just as there, with regard to the phylacteries of the arm, it is referring to a place which is fit to become ritually impure with only one type of leprous mark, that of the skin, so too here, with regard to the phylacteries of the head, it is referring to a place which is fit to become ritually impure with only one type of leprous mark, that of a place of hair (see Leviticus 13:29–37). Rabbi Yehuda continues: This serves to exclude the area which is literally “between your eyes,” as there is flesh and the hair of the eyebrows present there, and therefore there is a possibility of leprosy through the growth of a white hair, which is impure according to the halakhot of leprosy of the skin (see Leviticus 13:3), and there is also a possibility of leprosy through the growth of a yellow hair, which is impure according to the halakhot of leprosy of the head or the beard (see Leviticus 13:30).