Leviticus 4:10

8He shall take all the fat of the bull of the sin offering from it: the fat that covers the innards, and all the fat that is on the innards,

9and the two kidneys, and the fat that is on them, which is by the loins, and the cover on the liver, with the kidneys, he shall remove,

10as it is removed from the bull of the sacrifice of peace offerings. The priest shall burn them on the altar of burnt offering.

11He shall carry the bull’s skin, all its meat, with its head, and with its legs, its innards, and its dung

12—all the rest of the bull—outside of the camp to a clean place where the ashes are poured out, and burn it on wood with fire. It shall be burned where the ashes are poured out.