Leviticus 4:20

4:20 He must do with the rest of the bull just as he did with the bull of the sin offering; this is what he must do with it. So the priest will make atonement on their behalf and they will be forgiven.

Leviticus 4:35

4:35 Then the one who brought the offering must remove all its fat (just as the fat of the sheep is removed from the peace offering sacrifice) and the priest must offer them up in smoke on the altar on top of the other gifts of the Lord. So the priest will make atonement on his behalf for his sin which he has committed and he will be forgiven.