Reference for Chullin 61:21

אמר רב מנשה

R'Aha, the son of R'Awia, asked R'Manasseh: What is the law if one used a needle [for slaughtering]? - He replied: A needle rends<span class="x" onmousemove="('comment',' A needle, even when moved to and fro, tears the organs and does not cut them; hence the slaughtering is invalid.');">⁶</span>

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