1st Chronicles Chapter 23 Darby English Bible
The sons of Amram: Aaron and Moses. And Aaron was separated, that he should be hallowed as most holy, he and his sons for ever, to offer before Jehovah, to do service to him, and to bless in his name for ever.
These were the sons of Levi according to their fathers' houses, the chief fathers, as they were reckoned, by number of names by their polls, who did the work of the service of the house of Jehovah, from twenty years old and upward.
For their place was by the side of the sons of Aaron for the service of the house of Jehovah, over the courts, and over the chambers, and over the purifying of all holy things, and [for] the work of the service of the house of God;
and for the loaves to be set in rows, and for the fine flour for the oblation, and for the unleavened cakes, and for [what is baked in] the pan, and for that which is saturated [with oil], and for all measure of capacity and size;
and for all burnt-offerings offered up to Jehovah on the sabbaths, on the new moons, and on the set feasts, by number, according to the ordinance concerning them, continually, before Jehovah;