Leviticus 9:1-5

1And it happened on the eighth day that Moses called Aaron and his sons and the elders of Israel;

2and he said to Aaron, “Take a bull calf as a sin offering and a ram as a burnt offering, [each] without blemish, and offer both before the Lord.

3Then say to the Israelites, ‘Take a male goat as a sin offering, and a calf and a lamb, both one year old, without blemish, as a burnt offering,

4and a bull and a ram as peace offerings to sacrifice before the Lord, and a grain offering mixed with [olive] oil, for today the Lord will appear to you.’ ”

5So they took what Moses had commanded to the front of the Tent of Meeting, and all the congregation approached and stood before the Lord.