King James Version
Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses;English Standard Version
The enrollment of the priests was according to their fathers' houses; that of the Levites from twenty years old and upward was according to their offices, by their divisions.Catholic Public Domain Version
And so, for the priests, by their families, and for the Levites, from the twentieth year and upward, by their orders and companies