25 Further, David and the chiefs of the groups for the service separated some of the sons of Aʹsaph, Heʹman, and Je·duʹthun+ to serve by prophesying with the harps, the stringed instruments,+ and the cymbals.+ The list of the official men for this service was,

15 And the singers, the sons of Aʹsaph,+ were at their positions by the commandment of David,+ Aʹsaph,+ Heʹman, and Je·duʹthun+ the visionary of the king; and the gatekeepers were at the different gates.+ There was no need for them to leave their service, because their brothers the Levites made preparations for them.