Reference for Chullin 245:16

אמר רב

AS FOR THE SKIN THAT IS ON THE NECK, R'JOHANAN B. NURI DOES NOT REGARD IT AS A CONNECTIVE,<span class="x" onmousemove="('comment',' It is negligible and soon falls away of itself by the weight of the rest of the hide, and therefore can no longer serve as a connective.');">¹²</span>

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