28 And the priest shall make atonement before the LORD on behalf of the person who erred by sinning unintentionally; and when atonement has been made for him, he will be forgiven.
Numbers 15:28 Cross References - MSB
Leviticus 4:35
35 And he shall remove all the fat, just as the fat of the lamb is removed from the peace offerings, and he shall burn it on the altar along with the offerings made by fire to the LORD. In this way the priest will make atonement for him for the sin he has committed, and he will be forgiven.