Leviticus 9:8-14

So Aaron went to the altar and slaughtered the calf as a sin offering for himself. His sons brought him the blood, and he dipped his finger in it and put it on the horns of the altar. He poured out the rest of the blood at the base of the altar. Then he burned on the altar the fat, the kidneys, and the long lobe of the liver from the sin offering, just as the LORD had commanded Moses. The meat and the hide, however, he burned outside the camp. Next Aaron slaughtered the animal for the burnt offering. His sons brought him the blood, and he splattered it against all sides of the altar. Then they handed him each piece of the burnt offering, including the head, and he burned them on the altar. Then he washed the internal organs and the legs and burned them on the altar along with the rest of the burnt offering.