Divrei HaYamim I 23:24-32 דברי הימים א כ״ג:כ״ד-ל״ב

These were the sons of Levi according to the houses of their fathers; the heads of father’s houses, as they were counted by number of names by their polls, who did the work for the service of the house of the Lord, from the age of twenty years and upwards.

For David said, The Lord God of Yisra᾽el has given rest to his people, that they may dwell in Yerushalayim forever:

and also to the Levites that they shall no more need to carry the tabernacle, nor any vessels of it for its service.

For by the last ordinances of David the Levites were numbered from twenty years old and above:

because their station was at the side of the sons of Aharon 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;

both for the showbread, and for the fine flour for a meal 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;

and to stand every morning to thank and praise the Lord, and likewise at evening;

and whenever burnt sacrifices are offered to the Lord on the sabbaths, on the new moons, and on the appointed seasons, by number, according to the order commanded to 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 Aharon their brethren, for the service of the house of the Lord.