Leviticus 4:25, 30

Then the priest is to take some of the blood of the sin offering with his finger and put it on the horns of the altar of burnt offering; and the rest of its blood he shall pour out at the base of the altar of burnt offering.

The priest shall take some of its blood with his finger and put it on the horns of the altar of burnt offering and shall pour out all the rest of its blood at the base of the altar.