Leviticus 5:6, 9, 12

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