Exodus 29:7-9

Revised Standard Version

⁷ And you shall take the anointing oil, and pour it on his head and anoint him. ⁸ Then you shall bring his sons, and put coats on them, ⁹ and you shall gird them with girdles^[a] and bind caps on them; and the priesthood shall be theirs by a perpetual statute. Thus you shall ordain Aaron and his sons.