The sons of Amram: Aaron and Moses; and Aaron was separated, that he should be sanctified as most holy, he and his sons for ever, to offer before the LORD, to minister unto Him, and to bless in His name for ever.
These were the sons of Levi after their fathers' houses, even the heads of the fathers' houses, according to their muster, 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 station was at the side of 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;
for the showbread also, and for the fine flour for a meal-offering, whether of unleavened wafers, or of that which is baked on the griddle, or of that which is soaked, and for all manner of measure and size;
and to offer all burnt-offerings unto the LORD, on the sabbaths, on the new moons, and in the appointed seasons, in number according to the ordinance concerning them, continually, before the LORD;
and that they should keep the charge of the tent of meeting, and the charge of the holy place, and the charge of the sons of Aaron their brethren, for the service of the house of the LORD.