Leviticus 9:5-7

9:5 So they took what Moses had commanded to the front of the Meeting Tent and the whole congregation presented them and stood before the Lord. 9:6 Then Moses said, “This is what the Lord has commanded you to do so that the glory of the Lord may appear to you.” 9:7 Moses then said to Aaron, “Approach the altar and make your sin offering and your burnt offering, and make atonement on behalf of yourself and on behalf of the people; and also make the people’s offering and make atonement on behalf of them just as the Lord has commanded.”