Midrash for Chullin 259:21
במינן קאמרת
AND THEIR MILK ARE FORBIDDEN, AND HE WHO SLAUGHTERED THEM OUTSIDE THE SANCTUARY IS LIABLE,<span class="x" onmousemove="('comment',' Even though because of their blemish they are not fit for sacrifice in the Sanctuary. In Bek. ');"><sup>17</sup></span>
Sifrei Devarim
(Devarim 18:3) "And this shall be the judgment of the Cohanim": We are hereby taught that the priestly gifts (shoulder, cheeks, and maw) are "law" (to the end of extracting them by court order from a thief who stole them from a Cohein who had acquired them from hefker [ownerless property]).
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