Leviticus 5:6, 9, 12

He shall also bring his guilt offering to the LORD for his sin which he has committed, a female from the flock, a lamb or a goat as a sin offering. So the priest shall make atonement on his behalf for his sin.

He shall also sprinkle some of the blood of the sin offering on the side of the altar, while the rest of the blood shall be drained out at the base of the altar: it is a sin offering.

He shall bring it to the priest, and the priest shall take his handful of it as its memorial portion and offer it up in smoke on the altar, with the offerings of the LORD by fire: it is a sin offering.