Leviticus 8:18-21

Then Moses presented the ram for the burnt offering. Aaron and his sons laid their hands on the ram’s head, and Moses slaughtered it. Then Moses took the ram’s blood and splattered it against all sides of the altar. Then he cut the ram into pieces, and he burned the head, some of its pieces, and the fat on the altar. After washing the internal organs and the legs with water, Moses burned the entire ram on the altar as a burnt offering. It was a pleasing aroma, a special gift presented to the LORD, just as the LORD had commanded him.