Leviticus 5:15-17 Easy-to-Read Version (ERV)
15 “You might promise to give something to the Lord. You might sin against me without meaning to by not giving what you promised. If you do that, you must bring a ram that has nothing wrong with it (or the same amount in silver using the official measure) as a guilt offering. 16 You must give what you promised and add one-fifth of that amount as a fine. Give it to the priest and he will use the ram to make you pure, and God will forgive you.
17 “If you sin and break any of the commands that the Lord said must not be done, you are guilty. Even if you did not know about it, you are still responsible for your sin.