Reference for Yevamot 30:12

למאי נפקא מינה למיפשט ולד מחזיר גרושתו לבית הלל

— Granted that he<span class="x" onmousemove="('comment',' A descendant from a marriage punishable by kareth. ');">²¹</span> was not a bastard, he is nevertheless tainted;<span class="x" onmousemove="('comment',' Though not actually a bastard, he would, were he a kohen, he disqualified from the priesthood. ');">²²</span>

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