Leviticus 4:25-27

²⁵The priest shall take some of the blood of the sin offering with his finger, and put it on the horns of the altar of burnt offering. He shall pour out the rest of its blood at the base of the altar of burnt offering.

²⁶All its fat he shall burn on the altar, like the fat of the sacrifice of peace offerings; and the priest shall make atonement for him concerning his sin, and he will be forgiven.

²⁷“‘If anyone of the common people sins unwittingly, in doing any of the things which Yahweh has commanded not to be done, and is guilty,