Numbers 4:1-3

21st Century King James Version

4 And the Lord spoke unto Moses and unto Aaron, saying,

² “Take a count of the sons of Kohath from among the sons of Levi, according to their families, by the house of their fathers,

³ from thirty years old and upward even until fifty years old, all who enter into the host, to do the work in the tabernacle of the congregation.