Reference for Niddah 104:20

ואמר רבי שמעון מצאני חנינא בן חכינאי בצידן ואמר

IS IN AN UNSETTLED CONDITION<span class="x" onmousemove="('comment',' Lit., 'damaged', sc. the calculations (that enable her to determine in which days she is liable to menstruation and in which she is susceptible to zibah) are upset since she is unable to ascertain when exactly the discharge (of which the blood-stain is the result) had occurred. ');">¹⁶</span>

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