Leviticus 4:3, 12, 21

“ ‘If the anointed priest sins, bringing guilt on the people, he must bring to the LORD a young bull without defect as a sin offering for the sin he has committed.

that is, all the rest of the bull—he must take outside the camp to a place ceremonially clean, where the ashes are thrown, and burn it there in a wood fire on the ash heap.

Then he shall take the bull outside the camp and burn it as he burned the first bull. This is the sin offering for the community.