Exodus 29:28
And it shall be Aaron's and his sons' by a statute for ever from the children of Israel: for it is an heave offering: and it shall be an heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering to the LORD.
Torrey's Topical Textbook—AKJV

Leviticus 7:34
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.
Torrey's Topical Textbook—AKJV