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 unto Aaron the priest and unto his sons by a statute for ever from among the children of Israel."
Cross References (ranked by relevance)
Exodus 29:9
And thou shalt gird them with girdles, Aaron and his sons, and put the bonnets on them: and the priest’s office shall be theirs for a perpetual statute: and thou shalt consecrate Aaron and his sons.
Leviticus 3:17
It shall be a perpetual statute for your generations throughout all your dwellings, that ye eat neither fat nor blood.
Deuteronomy 18:3
And this shall be the priest’s due from the people, from them that offer a sacrifice, whether it be ox or sheep; and they shall give unto the priest the shoulder, and the two cheeks, and the maw.