Exodus 30:10-12

21st Century King James Version

¹⁰ 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.”

¹¹ And the Lord spoke unto Moses, saying,

¹² “When thou takest the sum of the children of Israel according to their number, then shall they give every man a ransom for his soul unto the Lord when thou numberest them, that there be no plague among them when thou numberest them.