Numbers 15:25
25 tAnd the priest shall make atonement for all the congregation of the people of Israel, and they shall be forgiven, because it was a mistake, and they have brought their offering, a food offering to the Lord, and their sin offering before the Lord for their mistake.
Numbers 15:28
28 vAnd 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.