Reference for Chullin 149:1

בשחיטה יבישתא ודלא כרבי שמעון

It was a dry slaughtering,<span class="x" onmousemove="('comment',' No blood flowed out at the time of the slaughtering so that not even the dam was rendered susceptible to contract uncleanness. The act of slaughtering alone, according to this Tanna, does not render the animal susceptible to uncleanness, contra R. Simeon.');">¹</span>

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