1 Chronicles 23:5 DBY

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

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

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

⁶  And David divided them into courses according to the sons of Levi: Gershon, Kohath, and Merari.

⁷  Of the Gershonites: Laadan and Shimei.