Exodus 29:7-9

King James 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 put the bonnets on them: and the priest's office shall be theirs for a perpetual statute: and thou shalt consecrate Aaron and his sons.