Reference for Niddah 141:7

מאי קא משמע לן דהא בלא הא לא סגי

owing to the fright of the angel of death, she experiences a discharge [it could be retorted]: Have we not in fact learnt that fear causes blood to disappear?<span class="x" onmousemove="('comment',' Supra 39a, Sot. 20b. ');">⁶</span>

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