Leviticus 9:7-9

New Century Version

⁷ Then Moses told Aaron, “Go to the altar and offer sin offerings and whole burnt offerings. Do this to remove your sins and the people’s sins so you will belong to God. Offer the sacrifices for the people and perform the acts to remove their sins for them so they will belong to the Lord, as the Lord has commanded.”

⁸ So Aaron went to the altar and killed the bull calf as a sin offering for himself. ⁹ Then his sons brought the blood to him, and he dipped his finger in the blood and put it on the corners of the altar. He poured out the rest of the blood at the bottom of the altar.