Now these are the last words of David. David the son of Yishai says, the man who was raised on high says, the anointed of the God of Ya`akov, the sweet psalmist of Yisra'el:
These were the sons of Levi after their fathers' houses, even the heads of the fathers' houses of those who were counted individually, in the number of names by their polls, who did the work for the service of the house of the LORD, from twenty years old and upward.
For their office was to wait on the sons of Aharon for the service of the house of the LORD, in the courts, and in the chambers, and in the purifying of all holy things, even the work of the service of the house of God;
and those who were reckoned by genealogy of the Kohanim by their fathers' houses, and the Levites from twenty years old and upward, in their offices by their divisions;