Reference for Niddah 115:17

ולא מחזקינן טומאה ממקום למקום

had a wound on her neck in a position to which the blood stain might be attributed,<span class="x" onmousemove="('comment',' Sc. if the position of the wound was such that when the woman bends down some blood might drop from it on to the spot where the stain was discovered. ');">¹⁵</span>

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