Parallel
Exodus 30:10
Brenton's English Septuagint · Berean Standard Bible
And once in the year Aaron shall make atonement on its horns, he shall purge it with the blood of purification for their generations: it is most holy to the Lord.
Once a year Aaron shall make atonement on the horns of the altar. Throughout your generations he shall make atonement on it annually with the blood of the sin offering (note: Or purification offering) of atonement. The altar is most holy to the LORD.”