Reference for Keritot 41:34

החותך מן האדם צריך מחשבה והכשר

Surely we have learnt: They laid down this general rule concerning uncleanness: Everything that serves as food for man [and became unclean] remains unclean until it becomes unfit to be food for dogs!<span class="x" onmousemove="('comment',' Toh. VIII, 6.');">²³</span>

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