Reference for Niddah 125:55

ותניא אידך

<b><i>MISHNAH</i></b>. FOR EVERY WOMAN THAT HAS A SETTLED PERIOD IT SUFFICES [TO RECKON HER PERIOD OF UNCLEANNESS FROM] HER SET TIME. AND THESE ARE THE SYMPTOMS OF SETTLED PERIODS: [IF THE WOMAN]<span class="x" onmousemove="('comment',' Before experiencing a menstrual discharge. ');">⁴⁴</span>

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