Leviticus 7:30-31

7:30 With his own hands he must bring the Lord’s gifts. He must bring the fat with the breast to wave the breast as a wave offering before the Lord, 7:31 and the priest must offer the fat up in smoke on the altar, but the breast will belong to Aaron and his sons.

Leviticus 7:34

7:34 for the breast of the wave offering and the thigh of the contribution offering I have taken from the Israelites out of their peace offering sacrifices and have given them to Aaron the priest and to his sons from the people of Israel as a perpetual allotted portion.’”