Leviticus 9:6-8

New Revised Standard Version, Anglicised Catholic Edition

⁶ And Moses said, ‘This is the thing that the Lord commanded you to do, so that the glory of the Lord may appear to you.’ ⁷ Then Moses said to Aaron, ‘Draw near to the altar and sacrifice your sin-offering and your burnt-offering, and make atonement for yourself and for the people; and sacrifice the offering of the people, and make atonement for them; as the Lord has commanded.’

⁸ Aaron drew near to the altar, and slaughtered the calf of the sin-offering, which was for himself.