These were the sons of Levi by their fathers' houses, the heads of fathers' houses as they were registered according to the number of the names of the individuals from twenty years old and upward who were to do the work for the service of the house of the LORD.
For David said, "The LORD, the God of Israel, has given peace to his people; and he dwells in Jerusalem for ever.
And so the Levites no longer need to carry the tabernacle or any of the things for its service" --
for by the last words of David these were the number of the Levites from twenty years old and upward--
"but their duty shall be to assist the sons 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;
to assist also with the showbread, the flour for the cereal offering, the wafers of unleavened bread, the baked offering, the offering mixed with oil, and all measures of quantity or size.
And they shall stand every morning, thanking and praising the LORD, and likewise at evening,
and whenever burnt offerings are offered to the LORD on sabbaths, new moons, and feast days, according to the number required of them, continually before the LORD.
Thus they shall keep charge of the tent of meeting and the sanctuary, and shall attend the sons of Aaron, their brethren, for the service of the house of the LORD."
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)