Leviticus 8:14-17

14He then presented the bull for the sin offering, and Aaron and his sons laid their hands on its head. 15Moses slaughtered the bull and took some of the blood, and with his finger he put it on all the horns of the altar to purify the altar. He poured out the rest of the blood at the base of the altar. So he consecrated it to make atonement for it. 16Moses also took all the fat around the internal organs, the long lobe of the liver, and both kidneys and their fat, and burned it on the altar. 17But the bull with its hide and its flesh and its intestines he burned up outside the camp, as the Lord commanded Moses.