Leviticus 4:3, 21, 31, 35

if it is the anointed priest who sins, thus bringing guilt on the people, then he shall offer for the sin that he has committed a bull from the herd without blemish to the LORD for a sin offering.

And he shall carry the bull outside the camp and burn it up as he burned the first bull; it is the sin offering for the assembly.

And all its fat he shall remove, as the fat is removed from the peace offerings, and the priest shall burn it on the altar for a pleasing aroma to the LORD. And the priest shall make atonement for him, and he shall be forgiven.

And all its fat he shall remove as the fat of the lamb is removed from the sacrifice of peace offerings, and the priest shall burn it on the altar, on top of the LORD’s food offerings. And the priest shall make atonement for him for the sin which he has committed, and he shall be forgiven.