The Sages taught in a baraita: Four things require bolstering, constant effort to improve, and they are: Torah, good deeds, prayer, and occupation.

From where is it derived that prayer requires bolstering? As it is said: “Hope in the Lord, strengthen yourself, let your heart take courage, and hope in the Lord.” (Ps 27:14)

Shimon the Righteous was one of the last of the men of the great assembly. He used to say: the world stands upon three things: the Torah, the Temple service, and the practice of acts of piety.

It was stated: Rabbi Yosei, son of Rabbi Ḥanina, said: The practice of praying three times daily is ancient, albeit not in its present form; prayers were instituted by the Patriarchs. However, Rabbi Yehoshua ben Levi said that the prayers were instituted based on the daily offerings sacrificed in the Holy Temple, and the prayers parallel the offerings, in terms of both time and characteristics.

The Gemara comments: It was taught in a baraitain accordance with the opinion of Rabbi Yosei, son of Rabbi Ḥanina, and it was taught in a baraitain accordance with the opinion of Rabbi Yehoshua ben Levi. The Gemara elaborates: It was taught in a baraitain accordance with the opinion of Rabbi Yosei, son of Rabbi Ḥanina: Abraham instituted the morning prayer, as it is stated when Abraham came to look out over Sodom the day after he had prayed on its behalf: “And Abraham rose early in the morning to the place where he had stood before the Lord” (Genesis 19:27), and from the context as well as the language utilized in the verse, the verb standing means nothing other than prayer, as this language is used to describe Pinehas’ prayer after the plague, as it is stated: “And Pinehas stood up and prayed and the plague ended” (Psalms 106:30). Clearly, Abraham was accustomed to stand in prayer in the morning.

Isaac instituted the afternoon prayer, as it is stated: “And Isaac went out to converse [lasuaḥ] in the field toward evening” (Genesis 24:63), and conversation means nothing other than prayer, as it is stated: “A prayer of the afflicted when he is faint and pours out his complaint [siḥo] before the Lord” (Psalms 102:1). Obviously, Isaac was the first to pray as evening approached, at the time of the afternoon prayer.

Jacob instituted the evening prayer, as it is stated: “And he encountered [vayifga] the place and he slept there for the sun had set” (Genesis 28:11). The word encounter means nothing other than prayer, as it is stated when God spoke to Jeremiah: “And you, do not pray on behalf of this nation and do not raise on their behalf song and prayer, and do not encounter [tifga] Me for I do not hear you” (Jeremiah 7:16). Jacob prayed during the evening, after the sun had set.

And it was taught in a baraitain accordance with the opinion of Rabbi Yehoshua ben Levi that the laws of prayer are based on the laws of the daily offerings: Why did the Rabbis say that the morning prayer may be recited until noon? Because, although the daily morning offering is typically brought early in the morning, it may be sacrificed until noon. And Rabbi Yehuda says: My opinion, that the morning prayer may be recited until four hours into the day, is because the daily morning offering is sacrificed until four hours.

And why did the Rabbis say that the afternoon prayer may be recited until the evening? Because the daily afternoon offering is sacrificed until the evening. Rabbi Yehuda says that the afternoon prayer may be recited only until the midpoint of the afternoon because, according to his opinion, the daily afternoon offering is sacrificed until the midpoint of the afternoon.

And why did they say that the evening prayer is not fixed? Because the burning of the limbs and fats of the offerings that were not consumed by the fire on the altar until the evening. They remained on the altar and were offered continuously throughout the entire night.

And why did the Rabbis say that the additional prayer may be recited all day? Because the additional offering is brought throughout the entire day. However, Rabbi Yehuda says that the additional prayer may be recited until the seventh hour of the day, because the additional offering is sacrificed until the seventh hour.

In any case, it is clear that according to this baraita the halakhot of prayer are based on the Temple offerings. The Gemara suggests: Let us say that this is a conclusive refutation of the opinion of Rabbi Yosei, son of Rabbi Ḥanina, who held that the forefathers instituted the prayers. Rabbi Yosei, son of Rabbi Ḥanina, could have said to you: Actually, I will say to you that the Patriarchs instituted the prayers and the Sages based the times and characteristics of prayer on the Temple offerings, even though they do not stem from the same source. As, if you do not say so, that even Rabbi Yosei, son of Rabbi Ḥanina, would agree that the laws of offerings and those of prayers are related, then, according to Rabbi Yosei, son of Rabbi Ḥanina, who instituted the additional prayer? It is not one of the prayers instituted by the forefathers. Rather, even according to Rabbi Yosei, son of Rabbi Ḥanina, the prayers were instituted by the Patriarchs and the Sages based them on the laws of the offerings.

On the topic of one who forgot to pray and seeks to compensate for the prayer that he missed, a dilemma was raised before them in the study hall: One who erred and did not recite the afternoon prayer, what is the ruling? May he recite in the evening prayer twoAmida prayers? The Gemara articulates the sides of the dilemma: If you say that one who erred and did not pray the evening prayer prays in the morning prayer twoAmida prayers, perhaps that is because the evening and the morning are both part of one day, as it is written: “And there was evening and there was morning, one day” (Genesis 1:5); the evening and the following morning constitute a single unit. But here, in the case under discussion, perhaps prayer is in place of sacrifice. Since in the case of sacrifice we say, since its day passed, its sacrifice is invalid and there is no way to compensate for the missed opportunity, the same should be true for prayer. Or, perhaps, since prayer is supplication, any time that one wishes, he may continue to pray?

Come and hear a resolution to this dilemma from that which Rav Huna bar Yehuda said that Rabbi Yitzḥak said that Rabbi Yoḥanan said: One who erred and did not recite the afternoon prayer, prays in the evening prayer twoAmida prayers and there is no element of: Its day passed, its sacrifice is invalid.

(5) Thus, too, they ordained that the Services of Prayer should be equal in number to the Sacrifices—two services of prayer daily, corresponding to the two daily offerings. And for the day on which an additional offering was ordained, they instituted a third prayer, corresponding to the additional offering. The Service which corresponds to the daily morning sacrifice is called the Morning Prayer. The Service which corresponds to the Afternoon Sacrifice is called the Afternoon Prayer, and the Service corresponding to the Additional offering is called the Additional Prayer.

(1) Adam, the first man, was commanded with six commandments: 1) idolatry, 2) “blessing” (euphemistically) the Name (of G-d), 3) murder, 4) illicit sexual relations, 5) thievery and, 6) establishing a system of justice. Even though all of these have been received as a Tradition from Moses our Teacher and we can understand the rationale for them, nevertheless, from (verses in) the Torah (we learn that) it was these that they were commanded. A seventh commandment forbidding the eating of a limb torn from a live animal was added for Noah, as it says, “Even flesh, life is in the blood, do not eat of it” (Genesis 9:4). These commandments were universally applicable - until Abraham. With Abraham, circumcision was also commanded and he prayed Shacharis (the Morning Prayer). Isaac separated out a tithe and added another prayer in the afternoon and, with Jacob, the prohibition against eating the sciatic nerve was added, as was the Maariv (Evening) Prayer. In Egypt, Amram was commanded with other precepts and, with Moses our Teacher, the Torah was completed.

(1) To pray daily is an affirmative duty, as it is said, "And ye shall serve the Lord, your God" (Exodus 23:25). The service, here referred to, according to the teaching of tradition, is Prayer, as it is said, "And to serve Him with all your heart" (Deuteronomy 11:13), on which the sages commented, "What may be described as Service of the Heart? Prayer". The number of prayers is not prescribed in the Torah. No form of prayer is prescribed in the Torah. Nor does the Torah prescribe a fixed time for Prayer.

(1) It is a positive commandment from the Torah to cry out and to sound trumpets for all troubles that come upon the community; as it is stated (Numbers 10:9), "upon an enemy who attacks you and you sound trumpets." That is to say, [with] every matter that troubles you — such as famine, a plague, locusts and that which is similar to them — cry out about them, and sound the trumpets.