Reference for Chullin 273:13

אלא מעתה נוצה של עזים ליחייב

nor shear!<span class="x" onmousemove="('comment',' These verbs stated at the head of the sentence imply that the prohibition is general and not restricted to the specific objects mentioned in the verse. It follows then that it is forbidden to shear 'the fleece' (i.e., the hair) of an ox; consequently by analogy with the firstling 'the fleece' of an ox should also be subject to the law of the first of the fleece.');">⁸</span>

Jastrow

Jastrow