Numbers 15:24-26

²⁴then it shall be, if it be done in error by the congregation, it being hid from their eyes, that all the congregation shall offer one young bullock for a burnt-offering, for a sweet savour unto the LORD — 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 offering, an offering made by fire unto the LORD, and their sin-offering before the LORD, 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 in error.