Leviticus 1:5-9

Then he shall slaughter the bull before the Lord; and Aaron’s sons the priests shall offer up the blood and sprinkle the blood around on the altar that is at the doorway of the tent of meeting.

He shall then skin the burnt offering and cut it into its pieces.

And the sons of Aaron the priest shall put fire on the altar and arrange wood on the fire.

Then Aaron’s sons the priests shall arrange the pieces, with the head and the suet, on the wood which is on the fire that is on the altar.

Its entrails, however, and its legs he shall wash with water. And the priest shall offer all of it up in smoke on the altar as a burnt offering, an offering by fire as a soothing aroma to the Lord.