Bible Verses About Altar of Incense: Atonement made for, by the high priest once every year

And Aaron shall make atonement upon the horns of it once in the year; with the blood of the sin-offering of atonement once in the year shall he make atonement for it throughout your generations: it is most holy unto Jehovah.

And he shall go out unto the altar that is before Jehovah, and make atonement for it, and shall take of the blood of the bullock, and of the blood of the goat, and put it upon the horns of the altar round about.

And he shall sprinkle of the blood upon it with his finger seven times, and cleanse it, and hallow it from the uncleannesses of the children of Israel.