Leviticus 9:6-7

6Moses said, “This is the thing which the Lord has commanded you to do, that 1the glory of the Lord may appear to you.” 7Moses then said to Aaron, “Come near to the altar and 23offer your sin offering and your burnt offering, that you may make atonement for yourself and for the people; then make the offering 4for the people, that you may make atonement for them, just as the Lord has commanded.”