Reference for Niddah 118:12

ביושבת על שפת הספל ומזנקת בתוך הספל ונמצא דם בתוך הספל

— R. Abba replied. The reference is to a woman who sat on the rim of a bowl, discharging into the bowl, and blood was found within the bowl, [in which case it is obvious] that if the blood had issued after the water had ceased to flow it<span class="x" onmousemove="('comment',' Since the discharge of blood is not bow-shaped. ');">¹⁰</span>

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