Numbers 15:25, 28

And 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

And the priest shall make atonement for the soul that erreth, when he sinneth unwittingly, before Jehovah, to make atonement for him; and he shall be forgiven.