Leviticus 4:31-33

New Revised Standard Version Catholic Edition

³¹ He shall remove all its fat, as the fat is removed from the offering of well-being, and the priest shall turn it into smoke on the altar for a pleasing odor to the Lord. Thus the priest shall make atonement on your behalf, and you shall be forgiven.

³² If the offering you bring as a sin offering is a sheep, you shall bring a female without blemish. ³³ You shall lay your hand on the head of the sin offering; and it shall be slaughtered as a sin offering at the spot where the burnt offering is slaughtered.