Numbers 15:24-26

²⁴then it shall be, if it be done unwittingly, without the knowledge of the congregation, that all the congregation shall offer one young bullock for a burnt-offering, for a sweet savor unto Jehovah, with the meal-offering thereof, and the drink-offering thereof, according to the ordinance, and one he-goat for a sin-offering.

²⁵And the priest shall make atonement for all the congregation of the children of Israel, and they shall be forgiven; for it was an error, and they have brought their oblation, an offering made by fire unto Jehovah, and their sin-offering before Jehovah, for their error:

²⁶and all the congregation of the children of Israel shall be forgiven, and the stranger that sojourneth among them; for in respect of all the people it was done unwittingly.