Yoma 34B

רבי אומר: ערבית משל שחרית.

R' Yehuda HaNasi says: The daily afternoon offering is derived from that of the morning. The phrase: “The one lamb,” refers to the lamb of the daily morning offering, and the daily afternoon offering is derived from it.

בשלמא לרבנן, האי בתמיד של בין הערבים כתיב. אלא רבי, מאי טעמא? אמר רבה בר עולא, אמר קרא: ״לכבש האחד״, איזהו כבש שנאמר בו ״אחד״? הוי אומר זה תמיד של שחר.

The Talmud asks: Granted, according to the opinion of the Rabbis who hold that this verse is written with regard to the daily afternoon offering based on the preceding verses, they can explain that the daily morning offering is derived from the daily afternoon offering. However, what is the rationale for the opinion of R' Yehuda HaNasi, who holds that the afternoon offering is derived from the morning offering? Rabba bar Ulla said that the verse states: “For the one lamb.” Which is the lamb with regard to which it is previously stated: One? You must say: That is the lamb of the daily morning offering (see Exodus 29:39).

ורבנן: מאי ״אחד״⁠ — מיוחד שבעדרו. ורבי: מ״ומבחר נדריך״ נפקא. ורבנן: חד בחובה וחד בנדבה, וצריכי.

And according to the Rabbis, what is the meaning of the term: One? It means the special lamb that is one in his flock. The lamb for the daily offering should be of the highest quality. And from where does R' Yehuda HaNasi derive that principle? The Talmud answers that in his opinion, the principle is derived from that which is written: “And all the choicest of your vow-offerings” (Deuteronomy 12:11). One is required to fulfill his vow by offering the animal of the highest quality. And how do the Rabbis interpret this verse? They interpret that one verse refers to the requirement to bring the animal of the highest quality for obligatory offerings and one verse refers to the requirement to bring the animal of the highest quality for gift-offerings. And both verses are necessary, as otherwise it would not have been clear that this requirement applies to both. On the one hand, one might think it is only with regard to obligatory offerings that the animal of the highest quality must be sacrificed. On the other hand, one might think it is only with regard to a gift-offering that the animal of the highest quality must be sacrificed, as if it is not of the highest quality, it is better not to sacrifice it at all.