Leviticus 9:8-11

8So Aaron approached the altar and slaughtered the calf as a sin offering for himself. 9The sons of Aaron brought the blood to him, and he dipped his finger in the blood and applied it to the horns of the altar. And he poured out the rest of the blood at the base of the altar. 10On the altar he burned the fat, the kidneys, and the lobe of the liver from the sin offering, as the LORD had commanded Moses. 11But he burned up the flesh and the hide outside the camp.