Exodus 29:26-31

After you take the breast of the ram for Aaron’s ordination, wave it before the LORD as a wave offering, and it will be your share. ‘Consecrate those parts of the ordination ram that belong to Aaron and his sons: the breast that was waved and the thigh that was presented. This is always to be the regular share from the Israelites for Aaron and his sons. It is the contribution the Israelites are to make to the LORD from their fellowship offerings. ‘Aaron’s sacred garments will belong to his descendants so that they can be anointed and ordained in them. The son who succeeds him as priest and comes to the tent of meeting to minister in the Holy Place is to wear them seven days. ‘Take the ram for the ordination and cook the meat in a sacred place.