Reference for Niddah 74:16

על כרחך הקישן הכתוב

also renders void all previous counting.<span class="x" onmousemove="('comment',' From which it is self-evident that the days following it cannot be included in the counting of the seven days. According to the Rabbis, however, whose view Raba follows, birth does not render void all previous counting and the days following, it may well be included in the prescribed seven days. ');">¹⁵</span>

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