Reference for Keritot 29:36

ומודים חכמים לר' אליעזר בבא על ה' נשיו נדות בבת אחת שהוא חייב על כל אחת ואחת הואיל והוא גרם להן

with his five menstruant wives, that he is liable for each act, since he caused them liability to separate offerings.<span class="x" onmousemove="('comment',' I.e. the women who have also transgressed the same prohibition, have each to bring a separate sacrifice. A division has thus been established between the acts.');">²⁰</span>

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