Yoma 25A

מאי לאו, באותן שזכו לפייס. אמר רב הונא בר יהודה אמר רב ששת: לא, באותן שלא זכו לפייס.

What, is this not talking about those priests who won the lottery, describing how their non-sacred garments were removed from them before they were dressed in the priestly garments? Rav Huna bar Yehuda said that Rav Sheshet said, rejecting that interpretation: No, it is possible to explain that all the priests at the lottery were wearing sacred garments and that, on the contrary, the Mishnah speaks about those priests who did not win the lottery. The text describes how the sacred garments they wore during the lottery were removed from them.

הכי נמי מסתברא. דאי סלקא דעתך באותן שזכו לפייס, ״לא היו מניחין עליהן אלא מכנסים בלבד״? והתניא: מניין שלא יהא דבר קודם למכנסים ⁠— תלמוד לומר: ״ומכנסי בד יהיו על בשרו״!

The Talmud supports this latter interpretation: So too, it is reasonable to follow Rav Sheshet’s interpretation of the Mishnah. As, if it were to enter your mind to say that the Mishnah is dealing with those who won the lottery and describes how their non-sacred garments were removed and sacred garments put on, how would one understand the statement: They would leave only their trousers on them? One would have to explain that the priests subsequently donned the sacred clothes on top of the non-sacred trousers; then they would remove the non-sacred trousers and replace them with the sacred trousers. But wasn’t it taught in a baraita: From where is it derived that nothing should precede the trousers when the priest dresses? The verse states: “And he should have linen trousers upon his flesh” (Leviticus 16:4)? However, according to the proposed interpretation of the Mishnah, the priests donned the other sacred garments and put on the trousers after them.