Reference for Arakhin 3:27

מה סוף הקדש יורש אינו סומך אף תחלת הקדש יורש אינו מימר

Just as at the end of the dedication the heir does not lay on hands, thus also at th beginning<span class="x" onmousemove="('comment',' First an animal is separated for the purpose of being offered on the altar. That is the commencement of its sanctification. At the end, just before the slaying of the animal, the owner lays his hand on its head. R. Judah infers from the regulations at the end, viz., the prohibition for anyone but the owner to lay hands on the head, the inefficacy of the change at the beginning, i.e., his intended exchange has no effect on the animal he wanted to substitute.');">¹⁷</span>

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