KJV: These were the sons of Levi after the house of their fathers; even the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the LORD, from the age of twenty years and upward.
NASB: These were the sons of Levi according to their fathers' households, even the heads of the fathers' households of those of them who were counted, in the number of names by their census, doing the work for the service of the house of the LORD, from twenty years old and upward.
KJV: Because 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, and the work of the service of the house of God;
NASB: For their office is to assist the sons of Aaron with 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,
KJV: And that they should keep the charge of the tabernacle of the congregation, and the charge of the holy place, and the charge of the sons of Aaron their brethren, in the service of the house of the LORD.
NASB: Thus they are to keep charge of the tent of meeting, and charge of the holy place, and charge of the sons of Aaron their relatives, for the service of the house of the LORD.
KJV: These were the orderings of them in their service to come into the house of the LORD, according to their manner, under Aaron their father, as the LORD God of Israel had commanded him.
NASB: These were their offices for their ministry when they came in to the house of the LORD according to the ordinance given to them through Aaron their father, just as the LORD God of Israel had commanded him.
KJV: Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was:
NASB: Moreover, David and the commanders of the army set apart for the service some of the sons of Asaph and of Heman and of Jeduthun, who were to prophesy with lyres, harps and cymbals; and the number of those who performed their service was: