Reference for Bekhorot 78:47

נפגמה הזנב מן העצם וכו':

<big><b>GEMARA: </b></big>Said R'Eleazar: [The Mishnah particularly means a bag] which is mutilated, but not if it is removed.<span class="x" onmousemove="('comment',' For then it can return to its normal condition.');">²⁷</span>

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