Leviticus 4
34 Ref And the priest is to take some of the blood of the offering with his finger and put it on the horns of the altar of burned offering, and all the rest of the blood is to be drained out at the base of the altar;
35 Ref And let him take away all its fat, as the fat is taken away from the lamb of the peace-offerings; and let it be burned by the priest on the altar among the offerings made by fire to the Lord: and the priest will take away his sin and he will have forgiveness.