Leviticus 4:32-35

“If the people bring a sheep as their sin offering, it must be a female with no defects. They must lay a hand on the head of the sin offering and slaughter it at the place where burnt offerings are slaughtered. Then the priest will dip his finger in the blood of the sin offering and put it on the horns of the altar for burnt offerings. He will pour out the rest of the blood at the base of the altar. Then he must remove all the sheep’s fat, just as he does with the fat of a sheep presented as a peace offering. He will burn the fat on the altar on top of the special gifts presented to the LORD. Through this process, the priest will purify the people from their sin, making them right with the LORD, and they will be forgiven.