Leviticus 5:7-9

New Revised Standard Version Catholic Edition

⁷ But if you cannot afford a sheep, you shall bring to the Lord, as your penalty for the sin that you have committed, two turtledoves or two pigeons, one for a sin offering and the other for a burnt offering. ⁸ You shall bring them to the priest, who shall offer first the one for the sin offering, wringing its head at the nape without severing it. ⁹ He shall 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.