1 Chronicles 23:27-32

27For by the last words of David the Levites were numbered from twenty years old and above:1

28Because their office was to wait on the sons of Aaron for the service of the house of Yhwh, 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;2

29Both for the shewbread, and for the fine flour for grain 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;3

30And to stand every morning to thank and praise Yhwh, and likewise at even;

31And to offer all burnt sacrifices unto Yhwh in the sabbaths, in the new moons, and on the set feasts, by number, according to the order commanded unto them, continually before Yhwh:

32And 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 Yhwh.