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 4:26

4:26 Then the priest must offer all of its fat up in smoke on the altar like the fat of the peace offering sacrifice. So the priest will make atonement on his behalf for his sin and he will be forgiven.