Leviticus 5:17-19

17“If anyone sins and does what is forbidden in any of the Lord’s commands, even though they do not know it, they are guilty and will be held responsible.

18They are to bring to the priest as a guilt offering a ram from the flock, one without defect and of the proper value. In this way the priest will make atonement for them for the wrong they have committed unintentionally, and they will be forgiven.

19It is a guilt offering; they have been guilty of wrongdoing against the Lord.”