Reference for Chullin 266:51

אלא כיון דדמיין להדדי חשיב להו כחדא ה"נ כיון דדמיין להדדי חשיב להו כחדא

or do we have regard to the major portion of the animal and this belongs to the priest? - Come and hear: If a gentile or a priest delivered sheep to an Israelite to shear them, he<span class="x" onmousemove="('comment',' Sc., the Israelite.');">³³</span>

Jastrow

Jastrow