Leviticus 5:17-19

17“If someone sins and without knowing it violates any of the Lord’s commands concerning anything prohibited, he is guilty, and he will bear his iniquity.

18He must bring an unblemished ram from the flock according to your assessment of its value as a guilt offering to the priest. Then the priest will make atonement on his behalf for the error he has committed unintentionally, and he will be forgiven.

19It is a guilt offering; he is indeed guilty before the Lord.”