Leviticus 4:8-12

And he shall remove from it all the fat of the bull of the sin offering: the fat that covers the entrails, and all the fat which is on the entrails,

and the two kidneys with the fat that is on them, which is on the loins, and the lobe of the liver, which he shall remove with the kidneys

(just as it is removed from the ox of the sacrifice of peace offerings); and the priest is to offer them up in smoke on the altar of burnt offering.

But the hide of the bull and all its flesh, along with its head, its legs, its entrails, and its refuse,

that is, all the rest of the bull, he is to bring out to a clean place outside the camp where the fatty ashes are poured out, and burn it on wood with fire; where the fatty ashes are poured out it shall be burned.