Leviticus 7:33-34

MKJV(i) 33 He among the sons of Aaron who offers the blood of the peace offerings, and the fat, shall have the right shoulder for his part. 34 For I have taken the breast of the wave offering and the heave shoulder from the sons of Israel, from the sacrifices of their peace offerings, and have given them to Aaron the priest and to his sons by a statute forever from among the sons of Israel.