Exodus 29:26-30

26"You shall take the breast of the ram of Aaron's ordination and wave it for a wave offering before the Lord, and it shall be your portion.

27And you shall consecrate the breast of the wave offering that is waved and the thigh of the priests' portion that is contributed from the ram of ordination, from what was Aaron's and his sons'.

28It shall be for Aaron and his sons as a perpetual due from the people of Israel, for it is a contribution. It shall be a contribution from the people of Israel from their peace offerings, their contribution to the Lord.

29"The holy garments of Aaron shall be for his sons after him; they shall be anointed in them and ordained in them.

30The son who succeeds him as priest, who comes into the tent of meeting to minister in the Holy Place, shall wear them seven days.