Thematic Bible: Divided them into four classes

Of these, twenty-four thousand were to preside over the work of the house of Jehovah; and six thousand were officers and judges; and four thousand were doorkeepers; and four thousand praised Jehovah with the instruments which I made, said David, to praise therewith. And David divided them into courses according to the sons of Levi: Gershon, Kohath, and Merari.