1 Chronicles 23:2

1Now David was old and full of days; and he made Solomon his son king over Israel.

2He gathered together all the princes of Israel, with the priests and the Levites.

3The Levites were counted from thirty years old and upward; and their number by their polls, man by man, was thirty-eight thousand.

4David said, “Of these, twenty-four thousand were to oversee the work of the LORD’s house, six thousand were officers and judges,