Reference for Chullin 38:14

א"ל

And what is the law if a slaughterer cut the windpipe terminating in an existing gash [in the windpipe]?<span class="x" onmousemove="('comment',' In this case the lower half of the windpipe was already mutilated and the slaughterer cut the windpipe until he came to the gash.');">⁶</span>

Jastrow

Jastrow