Leviticus 7:31–38

³¹Who shall burn the fat upon the altar. But the breast shall be Aaron’s and his sons’.

³²The right shoulder also of the victim, of peace offerings shall fall to the priest for firstfruits.

³³He among the sons of Aaron, that offereth the blood, and the fat: he shall have the right shoulder also for his portion.

³⁴For the breast that is elevated and the shoulder that is separated I have taken of the children of Israel, from off their victims of peace offerings: and have given them to Aaron the priest, and to his sons, by a law for ever, from all the people of Israel.

³⁵This is the anointing of Aaron and his sons, in the ceremonies of the Lord, in the day when Moses offered them, that they might do the office of priesthood,

³⁶And the things that the Lord commanded to be given them by the children of Israel, by a perpetual observance in their generations.

³⁷This is the law of holocaust, and of the sacrifice for sin, and for trespass, and for consecration, and the victims of peace offerings:

³⁸Which the Lord appointed to Moses in mount Sinai, when he commanded the children of Israel, that they should offer their oblations to the Lord in the desert of Sinai.