Leviticus 5:10, 12, 18

The priest shall then offer the other as a burnt offering in the prescribed way and make atonement for them for the sin they have committed, and they will be forgiven.

They are to bring it to the priest, who shall take a handful of it as a memorial portion and burn it on the altar on top of the food offerings presented to the LORD. It is a sin offering.

They 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.