Leviticus 5:8-10

New Catholic Bible

⁸ He shall bring them to the priest who shall offer the first for the sin offering. He will wring its head from its neck, but he will not rip it apart. ⁹ He shall sprinkle some of the blood of the sin offering on the sides of the altar, while the rest he shall pour out at the base of the altar. This is a sin offering. ¹⁰ The other bird will be offered as a burnt offering, following the normal procedure. Thus the priest shall make atonement for him, for the sin he has committed, and he shall be forgiven.