1 Chronicles 23:2 - 23:6
2 And he gathered together all the leaders of Israel with the priests and the Levites.
The Work of the Levites3 And the Levites were numbered from thirty years old and upward, and their number by census of men was 38,000. 4 Of these, 24,000 were to direct the work of the house of Yahweh; and 6,000 were officers and judges, 5 and 4,000 were gatekeepers, and 4,000 were praising Yahweh with the instruments which David made for giving praise. 6 And David divided them into divisions according to the sons of Levi: Gershon, Kohath, and Merari.