Reference for Yoma 6:9
כי אתא רב דימי אמר ר' יוחנן מתני חדא [רבי יהושע בן לוי] מתני תרתי ר' יוחנן מתני חדא לעשות לכפר אלו מעשה יום הכפורים [וריב"ל] מתני תרתי לעשות אלו מעשה פרה לכפר אלו מעשה יום הכפורים
Others have this version of Rabina's reply: One may infer [certain rules for] a service held for the first time from a service held for the first time. This excludes all the other cases [referred to above], because none of them took place for the first time. What does this 'first time' mean? - Does it mean that the high priest had first performed service there?<span class="x" onmousemove="('comment',' The first service ever performed by a high priest was that on the eighth day of the Consecration, hence it would be right to infer therefrom the service on the Day of Atonement, when the high priest for the first time offered up the community's sacrifice, on the first Day of Atonement.');"><sup>29</sup></span> That would be [the argument of Rabina's in] the first version.