If a soul shall sin through ignorance ... let him bring for his sin, which he hath sinned, a young bullock without blemish unto the LORD for a sin offering. Leviticus 4:3-4
If a soul commit a trespass, and sin through ignorance, in the holy things of the LORD; then he shall bring for his trespass unto the LORD a ram without blemish out of the flocks ... and the priest shall make an atonement for him with the ram of the trespass offering, and it shall be forgiven him. Leviticus 5:15-16
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. Numbers 15:27-28