Leviticus 8:12-14

12He poured some of the anointing oil on Aaron’s head and anointed and consecrated him.

13Then Moses presented Aaron’s sons, clothed them with tunics, wrapped sashes around them, and fastened headbands on them, as the Lord had commanded Moses.

14Then he brought the bull near for the sin offering, and Aaron and his sons laid their hands on the head of the bull for the sin offering.