Reference for Keritot 42:4

א"ה הכשר נמי ניבעי

- This holds good only with regard to other foodstuffs, which transmit uncleanness neither by contact not by carrying;<span class="x" onmousemove="('comment',' Unclean foodstuffs cannot render a person unclean, either by contact or by carrying.');">⁴</span>

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