(יב) הִלֵּל וְשַׁמַּאי קִבְּלוּ מֵהֶם. הִלֵּל אוֹמֵר, הֱוֵי מִתַּלְמִידָיו שֶׁל אַהֲרֹן, אוֹהֵב שָׁלוֹם וְרוֹדֵף שָׁלוֹם, אוֹהֵב אֶת הַבְּרִיּוֹת וּמְקָרְבָן לַתּוֹרָה:
(12) Hillel and Shammai received [the oral tradition] from them. Hillel used to say: be of the disciples of Aaron, loving peace and pursuing peace, loving mankind and drawing them close to the Torah.
(יד) הוּא הָיָה אוֹמֵר, אִם אֵין אֲנִי לִי, מִי לִי. וּכְשֶׁאֲנִי לְעַצְמִי, מָה אֲנִי. וְאִם לֹא עַכְשָׁיו, אֵימָתָי:
(14) He [also] used to say: If I am not for myself, who is for me? But if I am for my own self [only], what am I? And if not now, when?
GEMARA: The Sages taught a baraita with regard to the basic halakha governing the eve of Passover that occurs on Shabbat: This law was forgotten by the sons of Beteira, who were the leaders of their generation. The fourteenth of Nisan once occurred on Shabbat, and they forgot and did not know whether the Paschal lamb overrides Shabbat or not. They said: Is there any person who knows whether the Paschal lamb overrides Shabbat or not? They said to them: There is a certain man in Jerusalem who came up from Babylonia, and Hillel the Babylonian is his name. At one point, he served the two most eminent scholars of the generation, Shemaya and Avtalyon, and he certainly knows whether the Paschal lamb overrides Shabbat or not. The sons of Beteira sent messengers and called for him. They said to him: Do you know whether the Paschal lamb overrides Shabbat or not? He said to them: Have we but one Paschal lamb during the year that overrides Shabbat? Do we not have many more than two hundred Paschal lambs, i.e., sacrifices, during the year that override Shabbat?
They said to him: From where do you know this? He said to them: “Its appointed time” is stated with regard to the Paschal lamb and “its appointed time” is also stated with regard to the daily offering, for the verse says: “Command the children of Israel and say to them, My offering, the provision of My sacrifice made with fire, for a sweet savor to Me, shall you observe to offer Me at its appointed time” (Numbers 28:2). From here we learn that the daily offering is brought even on Shabbat. Thus, the daily morning and afternoon offerings are brought on more than fifty Shabbatot over the course of the year, and two sheep are offered every Shabbat as additional offerings, for a total of more than two hundred sacrifices a year that override Shabbat. Just as the expression “its appointed time,” which is stated with regard to the daily offering, indicates that it overrides Shabbat, so too “its appointed time,” which is stated with regard to the Paschal lamb, indicates that it overrides Shabbat.
The Sages taught: There was an incident involving one gentile who came before Shammai. The gentile said to Shammai: How many Torahs do you have? He said to him: Two, the Written Torah and the Oral Torah. The gentile said to him: With regard to the Written Torah, I believe you, but with regard to the Oral Torah, I do not believe you. Convert me on condition that you will teach me only the Written Torah. Shammai scolded him and cast him out with reprimand. The same gentile came before Hillel, who converted him and began teaching him Torah. On the first day, he showed him the letters of the alphabet and said to him: Alef, bet, gimmel, dalet. The next day he reversed the order of the letters and told him that an alef is a tav and so on. The convert said to him: But yesterday you did not tell me that. Hillel said to him: You see that it is impossible to learn what is written without relying on an oral tradition. Didn’t you rely on me? Therefore, you should also rely on me with regard to the matter of the Oral Torah, and accept the interpretations that it contains.
There was another incident involving one gentile who came before Shammai and said to Shammai: Convert me on condition that you teach me the entire Torah while I am standing on one foot. Shammai pushed him away with the builder’s cubit in his hand. This was a common measuring stick and Shammai was a builder by trade. The same gentile came before Hillel. He converted him and said to him: That which is hateful to you do not do to another; that is the entire Torah, and the rest is its interpretation. Go study.
There was another incident involving one gentile who was passing behind the study hall and heard the voice of a teacher who was teaching Torah to his students and saying the verse: “And these are the garments which they shall make: A breastplate, and an efod, and a robe, and a tunic of checkered work, a mitre, and a girdle” (Exodus 28:4). The gentile said: These garments, for whom are they designated? The students said to him: For the High Priest. The gentile said to himself: I will go and convert so that they will install me as High Priest. He came before Shammai and said to him: Convert me on condition that you install me as High Priest. Shammai pushed him with the builder’s cubit in his hand. He came before Hillel; he converted him.
Eventually, the three converts gathered together in one place, and they said: Shammai’s impatience sought to drive us from the world; Hillel’s patience brought us beneath the wings of the Divine Presence.