Leviticus 9:8-10

New Catholic Bible

⁸ Aaron therefore drew near the altar and slew the calf of the sin offering, the offering for himself. ⁹ His sons brought the blood to him and he dipped his finger in it and put it on the horns of the altar, pouring the rest of the blood out at the base of the altar. ¹⁰ They burned the fat, the kidneys, and the lobe of the liver of the sin offering on the altar, as the Lord had commanded Moses.