Reference for Yoma 34:6

אמר אביי רישא ומציעתא רבנן ומודו רבנן בפרוסה דלאו אורח ארעא למיתבה לכ"ג

You have said: 'He takes one of the tw loaves'. That is in accord with Rabbi, who says: He can take one half. Now say the middle portion: 'Four or five of the shewbread loaves', that is in accord with the Sages who say that he does not take one half. Now say the last portion : Rabbi says: 'Always [he takes] five'. Does, then, the first and last part agree with Rabb and the middle with the Sages? -Abaye said: The first and the second parts agree with the Sages, and the Sages admit that it is not a proper thing to give the high priest a piece of bread.<span class="x" onmousemove="('comment',' Hence he may take one of the two loaves of Pentecost.');">⁴</span>

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