Exodus 29:14-18

But the flesh of the bull and its hide and its refuse, you shall burn with fire outside the camp; it is a sin offering.

“You shall also take the one ram, and Aaron and his sons shall lay their hands on the head of the ram;

and you shall slaughter the ram and take its blood and sprinkle it around on the altar.

Then you shall cut the ram into its pieces, and wash its entrails and its legs, and put them with its pieces and its head.

And you shall offer up in smoke the whole ram on the altar; it is a burnt offering to the Lord: it is a soothing aroma, an offering by fire to the Lord.