1Cron 6.31 And these are they whom David set over the service of song in the house of the LORD, after that the ark had rest.
1Cron 25.1 Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was: