Yoma 58A

רבי יונתן אומר: מזה בפני עצמו, ומזה בפני עצמו. אמר לו רבי יאשיה: והלא כבר נאמר: ״אחת״!

R' Yonatan says: He presents from this one, the bull’s blood, by itself, and he presents from that one, the goat’s blood, by itself and does not mix them. R' Yoshiya said to him: But wasn’t it already stated: “And Aaron should make atonement upon its corners once a year; with the blood of the sin-offering of atonement” (Exodus 30:10), which indicates that the High Priest does not present twice?

אמר לו רבי יונתן, והלא כבר נאמר: ״מדם הפר ומדם השעיר״! אם כן, למה נאמר ״אחת״? לומר לך: אחת ולא שתים מדם הפר, אחת ולא שתים מדם השעיר.

R' Yonatan said to him: But wasn’t it already stated: “Of the blood of the bull and of the blood of the goat” (Leviticus 16:18), which teaches that each set of sprinklings must be performed by itself? If so, why is “once” stated? This verse comes to tell you that he must perform the rite once and not perform two sets of sprinklings from the blood of the bull; and likewise he must perform the rite once and not perform two sets of sprinklings from the blood of the goat. From the blood of each of the animals, the High Priest presents only one set of sprinklings. This shows that R' Yoshiya and R' Yonatan indeed disagree with regard to this issue.

תניא אידך: ״ולקח מדם הפר ומדם השעיר״⁠ — שיהיו מעורבין זה בזה. אתה אומר שיהיו מעורבין זה בזה, או אינו אלא מזה בפני עצמו ומזה בפני עצמו? תלמוד לומר: ״אחת״. וסתמא כרבי יאשיה.

It was taught in another baraita: “And he should take of the blood of the bull and of the blood of the goat” (Leviticus 16:18). This verse teaches that the blood of the bull and the goat should be mixed together. Do you say that they should be mixed together, or perhaps that is not the case; rather, he presents from this blood by itself and from that by itself? Therefore, the verse states: “Once.” The Talmud comments: And this unattributed baraita is in accordance with the opinion of R' Yoshiya, who said the two sets of blood are mixed, as stated in the Mishnah.