Leviticus 5:17-19

17“If any of you do wrong—even one thing forbidden by any of the Lord’s commands, but you didn’t know it—when you realize your guilt, you must be punished.

18You must bring the priest a ram that has no defects from the flock or its value in money for a guilt offering. The priest will make peace with the Lord for the wrong you did unintentionally (although you didn’t know what you did), and you will be forgiven.

19It is a guilt offering because you are certainly guilty as far as the Lord is concerned.”