These were the descendants of Levi by their families – the heads of families as they were registered under their names and counted individually, that is, the workers twenty years old or more who served in the temple of the LORD.
NIV
These were the Levites by their fathers' houses, the heads of the fathers' houses of those registered, according to the number of names of the individuals who were the servants of the house of the Lord, from twenty years old and upward.
AMP
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.
KJV
And so the Levites carried out their responsibilities for the tent of meeting, for the Holy Place and, under their relatives the descendants of Aaron, for the service of the temple of the LORD.
NIV
So they shall keep charge of the Tent of Meeting and the Holy Place and shall attend to the sons of Aaron their kinsmen, for the service of the house of the Lord.
AMP
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.
KJV
The duty of the Levites was to help Aaron's descendants in the service of the temple of the LORD: to be in charge of the courtyards, the side rooms, the purification of all sacred things and the performance of other duties at the house of God.
NIV
But their duty should be to wait on [the priests] the sons of Aaron in the service of the house of the Lord, caring for the courts, the chambers, the cleansing of all holy things, and any work of the service of God's house
AMP
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;
KJV
They were in charge of the bread set out on the table, the special flour for the grain offerings, the thin loaves made without yeast, the baking and the mixing, and all measurements of quantity and size.
NIV
For the showbread also, and for the fine flour for a cereal offering, whether of unleavened wafers or of what is baked on the griddle or soaked [in oil], and for all measuring of amount and size [as the Law of Moses required].
AMP
Both for the shewbread, and for the fine flour for meat offering, and for the unleavened cakes, and for that which is baked in the pan, and for that which is fried, and for all manner of measure and size;
KJV
And whenever burnt offerings were presented to the LORD on the Sabbaths, at the New Moon feasts and at the appointed festivals. They were to serve before the LORD regularly in the proper number and in the way prescribed for them.
NIV
And to assist in offering all burnt sacrifices to the Lord on Sabbaths, New Moon festivals, and set feast days by number according to the ordinance concerning them, continually before the Lord.
AMP
And to offer all burnt sacrifices unto the LORD in the sabbaths, in the new moons, and on the set feasts, by number, according to the order commanded unto them, continually before the LORD:
KJV