Reference for Niddah 3:2
כל הנשים דיין שעתן
IT SUFFICES [TO RECKON] THEIR [PERIOD OF UNCLEANNESS FROM THE] TIME [OF THEIR DISCOVERING THE FLOW].<span class="x" onmousemove="('comment',' It being assumed that up to that moment there was no vestige of blood even in the ante-chamber (cf. Mishnah infra 40a). Hence only objects that were touched by the woman after the discovery become ritually unclean. All objects touched prior to that moment remain clean. ');"><sup>2</sup></span>
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