1 Chronicles 23:1-5

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

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

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

4Of these, twenty-four thousand were to preside over the work of the house of Jehovah; and six thousand were officers and judges;

5and four thousand were doorkeepers; and four thousand praised Jehovah with the instruments which I made, [said David,] to praise [therewith].