Reference for Yoma 95:7

אלא ש"מ מאי מדם הפר דם מהפר יקבלנו וקסבר גורעין ומוסיפין ודורשין

i.e.,from the blood of life<span class="x" onmousemove="('comment',' The blood coming forth in a jet, with which life leaves the body of the animal.');">⁵</span> and not from the blood of the skin, nor from the last blood oozing out.<span class="x" onmousemove="('comment',' Of the vein which was cut.');">⁶</span>

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