Leviticus 9:10

8So Aaron came near to the altar, and killed the calf of the sin offering, which was for himself.

9The 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;

10but the fat, and the kidneys, and the cover from the liver of the sin offering, he burned upon the altar, as the LORD commanded Moses.

11The meat and the skin he burned with fire outside the camp.

12He killed the burnt offering; and Aaron’s sons delivered the blood to him, and he sprinkled it around on the altar.