Reference for Chullin 272:21

ותניא אידך

R'Nahman B'Isaac said: Nowadays the world has adopted the views of the following three Elders: that of R'Ila'i with regard to the first of the fleece, for it has been taught: R'Ila'i says: The law of the first of fleece<span class="x" onmousemove="('comment',' Likewise the priestly dues of the shoulder, the two cheeks, and the maw (Rashi) .');">¹³</span>

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