Leviticus 9:3-9

³Then tell the Israelites, ‘Bring the following offerings: a male goat as a sin offering; a calf and a lamb, (both a year old and without defects), for a burnt offering;

⁴a bull and a ram as a peace offering to sacrifice before the Lord; and a grain offering mixed with olive oil. Do this because today the Lord is going to reveal himself to you today.’”

⁵Following Moses' orders they brought what he'd said to the front of the Tent of Meeting. Everyone came and stood before the Lord.

⁶Moses said, “This is what the Lord ordered me to tell you to do, so that you may see his glory.”

⁷Then Moses told Aaron, “Go to the altar and sacrifice your sin offering and your burnt offering to make you and the people right. Then sacrifice the offerings brought by the people as a means to make them right, as the Lord ordered.”

⁸So Aaron went to the altar and killed the calf as a sin offering for himself.

⁹His sons brought the blood to him. He dipped his finger in the blood and put it on the horns of the altar. He poured out the rest of the blood at the bottom of the altar.