Reference for Chullin 126:8

אלא ש"מ

So as not to give skeptics cause for criticism, for you might call it the ayyah and they the dayyah, or you the dayyah and they the ayyah; therefore it is written in Deuteronomy, The ra'ah, the ayyah and the dayyah after its kind.<a rel="footnote" href="#2">²</a>

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