Reference for Yoma 100:6

והתורם משלו על של חבירו טובת הנאה שלו

In truth it is obvious tha the matter depends on him who obtains atonement, and this is what he asked: Have his fellow-priests a definite share in the atonement<span class="x" onmousemove="('comment',' Through the bullock of the high priest, i.e., are they to be considered partners in the sacrifice from the time of its dedication.');">⁶</span> or do they receive their forgiveness merely by implication?<span class="x" onmousemove="('comment',' Jast.: circuit, transference in direction. Rashi: floating, unsettled condition. Goldschmidt: from Syriac: the bearer (of atonement) . i.e., the high priest.');">⁷</span>

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