Of Levites
Beside their genealogy of males, from three years old and upward, even unto every one that entereth into the house of the Lord, his daily portion for their service in their charges according to their courses; 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; And to the genealogy of all their little ones, their wives, and their sons, and their daughters, through all the congregation: for in their set office they sanctified themselves in holiness: (2 Chronicles 31:16-18)