Exodus 29:15-18

“Take one of the rams, and Aaron and his sons shall lay their hands on its head. Slaughter it and take the blood and splash it against the sides of the altar. Cut the ram into pieces and wash the internal organs and the legs, putting them with the head and the other pieces. Then burn the entire ram on the altar. It is a burnt offering to the LORD, a pleasing aroma, a food offering presented to the LORD.