Numbers 15:25 (KJV)

Even all that the Lord hath commanded you by the hand of Moses, from the day that the Lord commanded Moses, and henceforward among your generations;

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 savour unto the Lord, with his meat offering, and his drink offering, according to the manner, and one kid of the goats for a sin offering.

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 unto the Lord, and their sin offering before the Lord, for their ignorance:

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

And if any soul sin through ignorance, then he shall bring a she goat of the first year for a sin offering.