Reference for Niddah 64:9

לא צריכא

on one day, it suffices to wait only one day corresponding to it;<span class="x" onmousemove="('comment',' And if she observed a discharge on the second day also, she need only wait one day, after which she is clean. Only a discharge that continued for three consecutive days would subject her to the uncleanness of a confirmed zabah. ');">⁸</span>

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