Charles Ellicott Commentary Leviticus 5:9

"and he shall sprinkle of the blood of the sin-offering upon 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." — Leviticus 5:9 (ASV)

And he shall sprinkle. —Here again there is a striking difference between the ritual in the sacrifice before us and that in the case of the regular sin offering described in the previous chapters. The blood is simply to be thrown on the walls of the altar, while in the ordinary sin offering, the priest not only had to dip his finger seven times in the blood of the victim, but also had to put it on the horns of the altar (Leviticus 4:6–7; Leviticus 4:17–18; Leviticus 4:25; Leviticus 4:30; Leviticus 4:34).