Leviticus 7:32-34

32And the right shoulder shall ye give to the priest for an heave offering of the sacrifices of your peace offerings. 33He among the sons of Aaron, that offereth the blood of the peace offerings, and the fat, shall have the right shoulder for his part. 34For 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.