Leviticus 4:10-14

(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.

‘Now if the entire congregation of Israel does wrong unintentionally and the matter escapes the notice of the assembly, and they commit any of the things which the Lord has commanded not to be done, and they become guilty;

when the sin which they have committed becomes known, then the assembly shall offer a bull of the herd as a sin offering and bring it in front of the tent of meeting.