Numbers 15:28

The priest shall make atonement for the soul who errs, when he sins unwittingly, before the LORD, to make atonement for him; and he shall be forgiven.

Leviticus 4:35

All its fat he shall take away, like the fat of the lamb is taken away from the sacrifice of peace offerings; and the priest shall burn them on the altar, on the offerings of the LORD made by fire; and the priest shall make atonement for him concerning his sin that he has sinned, and he will be forgiven.

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