Exodus 30:10 in the King James Version
And Aaron shall make an atonement upon the horns of it once in a year with the blood of the sin offering of atonements: once in the year shall he make atonement upon it throughout your generations: it is most holy unto the LORD.
Context
9 You shall offer no strange incense on it, nor burnt offering, nor meal offering; and you shall pour no drink offering on it.
10 Aaron shall make atonement on its horns once in the year; with the blood of the sin offering of atonement once in the year he shall make atonement for it throughout your generations. It is most holy to the LORD.”
11 The LORD spoke to Moses, saying,