1 Chronicles 23:24-32

²⁴ These were the sons of Levi, grouped by families, the heads of the families of those who were numbered by name, by heads, all those of twenty years old and over who did the work of the house of the Lord. ²⁵ For David said, The Lord, the God of Israel, has given his people rest, and he has made his resting-place in Jerusalem for ever; ²⁶ And from now, there will be no need for the House of the Lord, and the vessels used in it, to be moved about by the Levites. ²⁷ So among the last acts of David was the numbering of the sons of Levi, from twenty years old and over. ²⁸ Their place was by the side of the sons of Aaron in all the work of the house of the Lord, in the open spaces and in the rooms, in the making clean of all the holy things, in doing all the work of the house of the Lord, ²⁹ The holy bread was in their care, and the crushed grain for the meal offering, of unleavened cakes or meal cooked over the fire or in water; they had control of all sorts of weights and measures; ³⁰ They had to take their places every morning to give praise and make melody to the Lord, and in the same way at evening; ³¹ At every offering of burned offerings to the Lord, on Sabbaths, and at the new moons, and on the regular feasts, in the number ordered by the law, at all times before the Lord; ³² And they had the care of the Tent of meeting and the holy place, under the direction of the sons of Aaron their brothers, for the work of the house of the Lord.