Exodus 29:15-18

15“1You shall also take the one ram, and Aaron and his sons shall lay their hands on the head of the ram; 16and you shall slaughter the ram and take its blood and sprinkle it around on the altar. 17Then you shall cut the ram into its pieces, and wash its entrails and its legs, and put them 2with its pieces and 3its head. 18And you shall offer up in smoke the whole ram on the altar; it is a burnt offering to the Lord: 4it is a soothing aroma, an offering by fire to the Lord.