Exodus 29:26-28

26“Then you shall take 1the breast of Aaron’s ram of 2ordination, and wave it as a wave offering before the Lord; and it shall be your portion. 27You shall consecrate the breast of the wave offering and the thigh of the 3contribution which was waved and which was 4offered from the ram of 5ordination, from the one which was for Aaron and from the one which was for his sons. 28It shall be for Aaron and his sons as their portion forever from the sons of Israel, for it is 6a contribution; and it shall be 7a contribution from the sons of Israel from the sacrifices of their peace offerings, their 8contribution to the Lord.