Numbers 15:26

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

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.