Leviticus 5:8-9

MLV(i) 8 And he will bring them to the priest, who will offer what is for the sin offering first and wring off its head from its neck, but will not divide it apart. 9 And he will sprinkle of the blood of the sin offering upon the side of the altar and the rest of the blood will be drained out at the base of the altar. It is a sin offering.