Reference for Chullin 269:24

(דברים טו, יט) ולא תגוז בכור צאנך

- In respect of animals consecrated for the altar this is indeed so,<span class="x" onmousemove="('comment',' And no verse is necessary to exclude consecrated animals fit for a sacrifice from the law of the first of the fleece.');"><sup>13</sup></span>