Reference for Bekhorot 12:4

{ויקרא יא } גמל טמא הוא הוא טמא ואין טמא הנולד מן הטהור טמא אלא טהור

intimating that he is unclean<span class="x" onmousemove="('comment',' And usually camels are born from camels and, since Scripture emphasizes that 'he' is unclean etc., this implies that a camel, however, born from a cow, is clean.');">³</span>

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