Leviticus 5:18-19

ISV(i) 18 He is to bring from the flock to the priest a ram without defect, estimated as to its value in silver shekels, as a guilt offering. Then the priest is to make atonement for him concerning his inadvertent act that he committed through ignorance, and it will be forgiven him. 19 It’s a sin offering for his guilt in the LORD’s presence.”