Numbers 15:24-26

24 Then it shall be, if ought be committed by ignorance without the knowledge of the congregation, that all the congregation shall offer one young bullock for a burnt offering, for a sweet smell to the LORD, with his meat offering, and his drink offering, according to the manner, and one kid of the goats for a sin offering.

25 And the priest shall make an atonement for all the congregation of the children of Israel, and it shall be forgiven them; for it is ignorance: and they shall bring their offering, a sacrifice made by fire to the LORD, and their sin offering before the LORD, for their ignorance:

26 And it shall be forgiven all the congregation of the children of Israel, and the stranger that sojournes among them; seeing all the people were in ignorance.