Leviticus 9:10-13

¹⁰He burned the fat, the kidneys, and the best part of the liver from the sin offering on the altar, as the Lord had ordered Moses to do.

¹¹However, he burned up the meat and the skin outside the camp.

¹²Aaron killed the burnt offering. His sons brought him the blood, and he sprinkled it on the sides of the altar.

¹³They brought him the head and all the other pieces of the burnt offering, and he burned them on the altar.