18 And the flesh of them shall be thine, as the wave-breast and as the right shoulder are thine
Numbers 18:18 Cross References - Webster
Exodus 29:26-28
26 And thou shalt take the breast of the ram of Aaron's consecration, and wave it for a wave-offering before the LORD: and it shall be thy part.
27 And thou shalt sanctify the breast of the wave-offering, and the shoulder of the heave-offering, which is waved, and which is heaved up of the ram of the consecration, even of that which is for Aaron, and of that which is for his sons:
28 And it shall be Aaron's and his sons' by a statute for ever, from the children of Israel: for it is a heave-offering: and it shall be a heave-offering from the children of Israel of the sacrifice of their peace-offerings, even their heave-offering to the LORD.
Leviticus 7:31-34
31 And the priest shall burn the fat upon the altar: but the breast shall be Aaron's and his sons'.
32 And the right shoulder shall ye give to the priest for a heave-offering of the sacrifices of your peace-offerings.
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.
34 For the wave-breast and the heave-shoulder have I taken of the children of Israel from off the sacrifices of their peace-offerings, and have given them to Aaron the priest, and to his sons, by a statute for ever, from among the children of Israel.