Exodus 29:7-9

American Standard Version

⁷ Then shalt thou take the anointing oil, and pour it upon his head, and anoint him. ⁸ And thou shalt bring his sons, and put coats upon them. ⁹ And thou shalt gird them with girdles, Aaron and his sons, and bind head-tires on them: and they shall have the priesthood by a perpetual statute: and thou shalt consecrate Aaron and his sons.