Exodus 29:20-21

20Then slaughter it, and apply some of its blood to the right earlobes of Aaron and his sons. Also put it on the thumbs of their right hands and the big toes of their right feet. Splatter the rest of the blood against all sides of the altar.

21Then take some of the blood from the altar and some of the anointing oil, and sprinkle it on Aaron and his sons and on their garments. In this way, they and their garments will be set apart as holy.