Reference for Chullin 137:2

דבר שגופה אסור ושאינה גופה מותר

Now what does the term NOT FROM THE BODY include?<span class="x" onmousemove="('comment',' For it cannot apply only to the case where a limb of the foetus was cut off, as that case is expressly stated earlier in the MISHNAH:');">¹</span>

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