Exodus 29:7-9

New International Reader's Version

⁷ Take the anointing oil and pour it on his head. ⁸ Bring his sons and dress them in their inner robes. ⁹ Put caps on their heads. Tie belts on Aaron and his sons. The work of the priests belongs to them. This is my law that will last for all time to come.

“Then you must prepare Aaron and his sons to serve me.