Leviticus 9:8-14

So Aaron drew near to the altar and killed the calf of the sin offering, which was for himself. And the sons of Aaron presented the blood to him, and he dipped his finger in the blood and put it on the horns of the altar and poured out the blood at the base of the altar. But the fat and the kidneys and the long lobe of the liver from the sin offering he burned on the altar, as the LORD commanded Moses. The flesh and the skin he burned up with fire outside the camp. Then he killed the burnt offering, and Aaron’s sons handed him the blood, and he threw it against the sides of the altar. And they handed the burnt offering to him, piece by piece, and the head, and he burned them on the altar. And he washed the entrails and the legs and burned them with the burnt offering on the altar.