Numbers 15:24-25

24then if it was done unintentionally without the knowledge of the congregation, all the congregation shall offer one bull from the herd for a burnt offering, a pleasing aroma to the Lord, with its grain offering and its drink offering, according to the rule, and one male goat for a sin offering.

25And 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.