Reference for Menachot 11:5

אלא אמר רב אשי משום דאיכא למימר מעיקרא דדינא פרכא מהיכא קא מייתית לה מבעל מום

But they have this also in common, have they not, that in each case there is an express command that it shall be so?<span class="x" onmousemove="('comment',' But this is not the case with trefah; so that it would not have been possible to infer the trefah animal from the common features of the other two (sc. the fat and the blood and the rite of nipping) , and therefore the verse is rendered superfluous.');">⁴</span> - R'Ashi therefore said, One could reply that the first proposition of the argument is unsound.

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