Leviticus 9:8-14

Aaron therefore went unto the altar, and slew the calf of the sin offering, which was for himself. And the sons of Aaron brought the blood unto him: and he dipped his finger in the blood, and put it upon the horns of the altar, and poured out the blood at the bottom of the altar: but the fat, and the kidneys, and the caul above the liver of the sin offering, he burnt upon the altar; as the LORD commanded Moses. And the flesh and the hide he burnt with fire without the camp. And he slew the burnt offering; and Aaron's sons presented unto him the blood, which he sprinkled round about upon the altar. And they presented the burnt offering unto him, with the pieces thereof, and the head: and he burnt them upon the altar. And he did wash the inwards and the legs, and burnt them upon the burnt offering on the altar.