Leviticus 5
8 Ref He shall bring them to the priest, who shall first offer the one which is for the sin offering, and wring off its head from its neck, but shall not sever it completely.
9 Ref He shall 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.
10 Ref He shall offer the second for a burnt offering, according to the ordinance; and the priest shall make atonement for him concerning his sin which he has sinned, and he shall be forgiven.