Leviticus 8:12-14
8:12 He then poured some of the anointing oil on the head of Aaron and anointed him to consecrate him.
8:13 Moses also brought forward Aaron’s sons, clothed them with tunics, wrapped sashes around them, and wrapped headbands on them just as the Lord had commanded Moses.
Consecration Offerings
8:14 Then he brought near the sin offering bull and Aaron and his sons laid their hands on the head of the sin offering bull,