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 Levites
3 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.