I Chronicles 25:1
World English Bible (WEB)
"Moreover, David and the captains of the army set apart for the service certain of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with stringed instruments, and with cymbals: and the number of those who did the work according to their service was:"
About I Chronicles
Genealogies and David's reign from a priestly perspective.
Old Testament • Book #13