Leviticus 4:20, 31

and do with this bull just as he did with the bull for the sin offering. In this way the priest will make atonement for the community, and they will be forgiven.

They shall remove all the fat, just as the fat is removed from the fellowship offering, and the priest shall burn it on the altar as an aroma pleasing to the LORD. In this way the priest will make atonement for them, and they will be forgiven.