Numbers 15:28

And the priest shall make atonement before the Lord for the person who makes a mistake , when he sins unintentionally , to make atonement for him, and he shall be forgiven .

The priest is to make atonement before the Lord for the one who erred by sinning unintentionally, and when atonement has been made, that person will be forgiven.

And the priest shall make an atonement for the soul that sinneth ignorantly, when he sinneth by ignorance before the Lord, to make an atonement for him; and it shall be forgiven him.