28 And the priest shall make atonement for the soul that erreth, when he sinneth unwittingly, before the LORD, to make atonement for him; and he shall be forgiven.
Numbers 15:28 Cross References - ERV
Leviticus 4:35
35 and all the fat thereof shall he take away, as the fat of the lamb is taken away from the sacrifice of peace offerings; and the priest shall burn them on the altar, upon the offerings of the LORD made by fire: and the priest shall make atonement for him as touching his sin that he hath sinned, and he shall be forgiven.