Reference for Chullin 161:37

אלא אמר רבא הכי קא אמר רב המנונא

If he first slaughtered the peace-offering and then the unconsecrated animal, he is culpable.<span class="x" onmousemove="('comment',' The warning in this case before the slaughtering of the unconsecrated animal is a certain warning, for by the act of slaughtering alone the law is transgressed.');">¹⁷</span>

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