Then he shall sprinkle some of the blood on it with his finger seven times, cleanse it, and consecrate it from the uncleanness of the children of Israel.
Leviticus 16:19
Surrounding context
16:18 And he shall go out to the altar that is before the LORD, and make atonement for it, and shall take some of the blood of the bull and some of the blood of the goat, and put it on the horns of the altar all around.
16:19 Then he shall sprinkle some of the blood on it with his finger seven times, cleanse it, and consecrate it from the uncleanness of the children of Israel.
16:20 "And when he has made an end of atoning for the Holy Place, the tabernacle of meeting, and the altar, he shall bring the live goat.