Leviticus 1:7-9

And Aaron's sons, the priests, are to put fire on the altar and put the wood in order on the fire: And Aaron's sons, the priests, are to put the parts, the head and the fat, in order on the wood which is on the fire on the altar: But its inside parts and its legs are to be washed with water, and it will all be burned on the altar by the priest for a burned offering, an offering made by fire, for a sweet smell to the Lord.