Leviticus 8:18-21

Then he presented the ram of the burnt offering, and Aaron and his sons laid their hands on the head of the ram. Moses slaughtered it and sprinkled the blood around on the altar. When he had cut the ram into its pieces, Moses offered up the head and the pieces and the suet in smoke. After he had washed the entrails and the legs with water, Moses offered up the whole ram in smoke on the altar. It was a burnt offering for a soothing aroma; it was an offering by fire to the LORD, just as the LORD had commanded Moses.