EXODUS 30:10
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 the LORD.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 the LORD.