Reference for Chullin 178:10

<big><strong>גמ׳</strong></big> מוקדשין פשיטא

BUTCHERS ARE NOT TRUSTWORTHY WITH REGARD TO THE [REMOVAL OF THE] SCIATIC NERVE:<span class="x" onmousemove="('comment',' For it entails hard and careful work, and it is doubtful whether the butcher would follow it up in all its ramifications; consequently one may not rely upon him.');">⁶</span>

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