Numbers 15:28

Then, in the LORD's presence, the priest is to make atonement for the person who sinned inadvertently, that is, to make atonement on his behalf so he may be forgiven.

Leviticus 4:35

Then the presenter is to remove all its fat, just as the fat was removed from the sacrifice of the peace offering. The priest is to burn it on the altar over the offerings made by fire to the LORD. This is how the priest will make atonement for him concerning the sin that he had committed. It will be forgiven him."

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