Exodus 29:26-31

Then take the breast of Aaron’s ordination ram, and lift it up in the LORD’s presence as a special offering to him. Then keep it as your own portion. “Set aside the portions of the ordination ram that belong to Aaron and his sons. This includes the breast and the thigh that were lifted up before the LORD as a special offering. In the future, whenever the people of Israel lift up a peace offering, a portion of it must be set aside for Aaron and his descendants. This is their permanent right, and it is a sacred offering from the Israelites to the LORD. “Aaron’s sacred garments must be preserved for his descendants who succeed him, and they will wear them when they are anointed and ordained. The descendant who succeeds him as high priest will wear these clothes for seven days as he ministers in the Tabernacle and the Holy Place. “Take the ram used in the ordination ceremony, and boil its meat in a sacred place.