Leviticus 4:26; Leviticus 4:31

26 'All its fat he shall offer up in smoke on the altar as in the case of the fat of the sacrifice of peace offerings. Thus the priest shall make atonement for him in regard to his sin, and he will be forgiven.

31 'Then he shall remove all its fat, just as the fat was removed from the sacrifice of peace offerings; and the priest shall offer it up in smoke on the altar for a soothing aroma to the LORD . Thus the priest shall make atonement for him, and he will be forgiven.