1 Chronicles 25:3, 6

Jeduthun’s sons who served were Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah. There were six of them, and Jeduthun directed them. He preached and used a harp to give thanks and praise to the LORD.

Heman directed all his sons in making music for the Temple of the LORD with cymbals, lyres, and harps; that was their way of serving in the Temple of God. King David was in charge of Asaph, Jeduthun, and Heman.