Now these are the last words of David: The oracle of David, son of Jesse, the oracle of the man whom God exalted, the anointed of the God of Jacob, the favorite of the Strong One of Israel:
These were the sons of Levi by their ancestral houses, the heads of families as they were enrolled according to the number of the names of the individuals from twenty years old and up who were to do the work for the service of the house of the Lord.
“but their duty shall be to assist the descendants of Aaron for the service of the house of the Lord, having the care of the courts and the chambers, the cleansing of all that is holy, and any work for the service of the house of God;
The enrollment of the priests was according to their ancestral houses; that of the Levites from twenty years old and up was according to their offices, by their divisions.
they shall be in charge of all the furnishings of the tent of meeting and attend to the duties for the Israelites as they do service at the tabernacle.