Leviticus 4:32-35

“If he brings a lamb as his offering for a sin offering, he shall bring a female without blemish and lay his hand on the head of the sin offering and kill it for a sin offering in the place where they kill the burnt offering. Then the priest shall take some of the blood of the sin offering with his finger and put it on the horns of the altar of burnt offering and pour out all the rest of its blood at the base of the altar. And all its fat he shall remove as the fat of the lamb is removed from the sacrifice of peace offerings, and the priest shall burn it on the altar, on top of the LORD’s food offerings. And the priest shall make atonement for him for the sin which he has committed, and he shall be forgiven.