Leviticus 5:17-19

17“Suppose you sin by violating one of the Lord’s commands. Even if you are unaware of what you have done, you are guilty and will be punished for your sin.

18For a guilt offering, you must bring to the priest your own ram with no defects, or you may buy one of equal value. Through this process the priest will purify you from your unintentional sin, making you right with the Lord, and you will be forgiven.

19This is a guilt offering, for you have been guilty of an offense against the Lord.”