Moses slaughtered the bull, took some of the blood, and applied it with his finger to all four horns of the altar, purifying the altar. He poured out the rest of the blood at the base of the altar and consecrated it so that atonement could be made on it.
Jewish Publication Society of America Version (JPS1917) - Leviticus 8:15 >And when it was slain, Moses took the blood, and put it upon the horns of the altar round about with his finger, and purified the altar, and poured out the remaining blood at the base of the altar, and sanctified it, to make atonement for it.