4. Avram went, as ה` had spoken to him, and Lot went with him.
And Avram was five years and seventy years old when he went out of Harran. 5. Avram took Sarai his wife and Lot his brother’s son, all their property that they had gained, and the persons whom they had made-their-own in Harran,
and they went out to go to the land of Canaan.
They came to the land of Canaan;

(16) But Ruth replied, “Do not urge me to leave you, to turn back and not follow you. For wherever you go, I will go; wherever you lodge, I will lodge; your people shall be my people, and your God my God. (17) Where you die, I will die, and there I will be buried. Thus and more may the LORD do to me if anything but death parts me from you.”

The Sages taught in a baraita: With regard to a convert who was circumcised but did not immerse, Rabbi Eliezer says that this is a convert, as so we found with our forefathers following the exodus from Egypt that they were circumcised but were not immersed. With regard to one who immersed but was not circumcised, Rabbi Yehoshua says that this is a convert, as so we found with our foremothers that they immersed but were not circumcised. And the Rabbis say: Whether he immersed but was not circumcised or whether he was circumcised but did not immerse, he is not a convert until he is circumcised and he immerses. The Gemara questions the opinions in the baraita: But let Rabbi Yehoshua also derive what is required for conversion from our forefathers; why didn’t he do so? And let Rabbi Eliezer also derive the halakha from our foremothers; why didn’t he do so? And if you would say that Rabbi Eliezer did not derive the halakha from our foremothers because he holds one cannot derive the possible from the impossible, i.e., one cannot derive that men do not require circumcision from the halakha that women do not require it, because for women it is a physical impossibility, that claim may be refuted.

The Gemara concedes: Rather, the baraita must be reinterpreted as follows: With regard to one who immersed but was not circumcised, everyone, i.e., both Rabbi Yehoshua and Rabbi Eliezer, agrees that the halakha is derived from the foremothers that immersion alone is effective. Where they disagree is with regard to one who was circumcised but had not immersed; Rabbi Eliezer derives that it is effective from the forefathers, and Rabbi Yehoshua disagrees because he maintains that in the conversion of the forefathers there was also an immersion. The Gemara asks: From where did he derive this? If we say that he derived it from the fact that it is written that in preparation for the revelation at Sinai, God commanded Moses: “Go unto the people and sanctify them today and tomorrow, and let them wash their garments” (Exodus 19:10), as Rabbi Yehoshua understands that the washing mentioned in this verse is the ritual immersion of clothes, this leads to the following a fortiori inference: Just as in a case where one became impure through contact with some source of impurity, washing, i.e., immersion, of clothes is not required but immersion of one’s body is required, then in a case where washing of clothes is required, as in the preparation for the revelation at Sinai, isn’t it logical that immersion of one’s body should also be required? The Gemara rejects the proof: But perhaps when the verse states that they had to wash their clothes, it was merely for cleanliness and not for the sake of ritual purity. If so, no a fortiori inference can be drawn from it to the case of immersion for ritual purity. Rather, Rabbi Yehoshua derived it from here, where the verse states with regard to the formation of the covenant at Sinai: “And Moses took the blood and sprinkled it upon the people” (Exodus 24:8), and it is learned as a tradition that there is no ritual sprinkling without immersion. Therefore, our forefathers also must have immersed at Sinai, and consequently that is also an essential requirement for all conversions. The Gemara asks: And with regard to the opinion of Rabbi Yehoshua, from where do we derive that also in the case of our foremothers there was immersion? The Gemara answers: It is based on logical reasoning, as, if so, that they did not immerse, then with what were they brought under the wings of the Divine Presence? Therefore, they also must have immersed.

It is taught in another baraita: The verse states: “And if a stranger sojourn with you, or whoever may be among you, throughout your generations, and will offer an offering made by fire, of a pleasing aroma unto the Lord, as you do, so he shall do” (Numbers 15:14).[...] Rabbi Yehuda HaNasi says: The offering of a convert is derived from the verse: “As you are, so shall the stranger be” (Numbers 15:15), which means as your ancestors were: Just as your ancestors entered the covenant only through circumcision and immersion in a ritual bath and the sprinkling of blood on the altar, so too they may enter the covenant only through circumcision and immersion and the sprinkling of some blood.