Leviticus 8:18-21

Then he presented the ram for the burnt offering, and Aaron and his sons laid their hands on the head of the ram. Moses slaughtered it and  splattered the blood on all sides of the altar. Moses cut the ram into pieces and burned the head, the pieces, and the fat,  but he washed the entrails and legs with water. He then burned the entire ram on the altar. It was a burnt offering for a pleasing aroma, a food offering to the LORD as he had commanded Moses.