Reference for Niddah 17:33

ולפיכך דרבי יוסי למה לי

does it suffice for women to reckon their uncleanness from the time they have observed a flow.<span class="x" onmousemove="('comment',' The suspension of the menstrual blood for twenty-four months being due in their opinion to the physical disturbance caused by the process of childbearing. ');">³¹</span>

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