1 Chronicles 25:2-3

Asaph’s sons who served were Zaccur, Joseph, Nethaniah, and Asarelah. King David chose Asaph to preach, and Asaph directed his sons. 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.