Now these be the last words of David. David the son of Jesse saith, and the man who was raised on high saith, the anointed of the God of Jacob, and the sweet psalmist of Israel:
These were the sons of Levi after their fathers' houses, even the heads of the fathers' houses of those of them that were counted, 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 Aaron 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 them that were reckoned by genealogy of the priests by their fathers' houses, and the Levites from twenty years old and upward, in their charges by their courses;