28 And the priest shall make atonement for the soul that committed the trespass unwillingly, and that sinned unwillingly before the Lord, to make atonement for him.
Numbers 15:28 Cross References - Brenton
Leviticus 4:35
35 And he shall take away all his fat, as the fat of the lamb of the sacrifice of peace-offering is taken away, and the priest shall put it on the altar for a whole-burnt-offering to the Lord; and the priest shall make atonement for him for the sin which he sinned, and it shall be forgiven him.