Leviticus 4:30-32

The Voice

³⁰ The priest will then dip his finger in some of its blood, put it on the horns of the altar of burnt offering, and then pour the rest of the blood at the base of the altar. ³¹ The priest is then to remove its fat in the same manner that the fat is removed from the peace offerings. The priest must offer up the fat on the altar, and the smoke of the sacrifice will rise and be a pleasant aroma to Me. This is how the priest will cover the sins of common people and how they will be forgiven.

³² If a person presents a lamb for the purification offering for sin, then he must bring an unblemished female.