Reference for Chullin 200:22

ר' יהודה אומר

in the beast ye may eat,<span class="x" onmousemove="('comment',' Deut. XIV, 6. Every part of the foetus that is within the womb of the dam may be eaten, the nerve as well as fat: so according to R. Judah. This verse applies only to clean beasts, i.e., those which may be eaten, but not to unclean beasts.');">¹⁷</span>

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