Reference for Niddah 145:14

ומוציא אני י"ב שאין ראוי לספירת או כי תזוב

since it is both suitable for the prescribed counting<span class="x" onmousemove="('comment',' Where the discharge appeared on the first three days after menstruation. ');">¹⁴</span>

Jastrow

Jastrow

Jastrow