Leviticus 7:33

Lev 7:33 He among the sons of Aaron, that offereth the blood of the peace offerings, and the fat, shall have the right shoulder for [his] part.

Ver. 33. He among the sons of Aaron. ] The breast belonged to the high priest and his family; but the right shoulder was for the priest that did officiate, or do the office of a priest, for that turn.