Exodus 29:24-28

24Put all these things in the hands of Aaron and his sons. Then lift these things up to the Lord as an offering to him.

25Then take them from Aaron and his sons and burn them on the altar. It is a burnt offering to the Lord. Its smell pleases him.

26Take the meat from the ribs of the sheep that makes Aaron God's special servant. Lift it up to the Lord as an offering to him. Then you may eat this meat from the sheep.

27You must keep separate this meat from the sheep's ribs, as well as the top part of its right leg. Those are the pieces that you lifted up to the Lord as an offering to him. Those pieces belong to Aaron and his sons.

28In the future, when the Israelites bring a peace offering to the Lord, these pieces will belong to Aaron and his descendants. This will always be the regular gift from the Israelites to the priests. That is the law that will continue for ever. It is the gift that the Israelites must bring to the Lord.