Leviticus 9:8-11

8So Aaron approached the altar and slaughtered the calf as a sin offering for himself.

9Aaron’s sons brought the blood to him, and he dipped his finger in the blood and applied it to the horns of the altar. He poured out the blood at the base of the altar.

10He burned the fat, the kidneys, and the fatty lobe of the liver from the sin offering on the altar, as the Lord had commanded Moses.

11He burned the flesh and the hide outside the camp.