1 Chronicles 25:3, 6

Of Jeduthun, the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah and Mattithiah, six, under the direction of their father Jeduthun with the harp, who prophesied in giving thanks and praising the LORD.

All these were under the direction of their father to sing in the house of the LORD, with cymbals, harps and lyres, for the service of the house of God. Asaph, Jeduthun and Heman were under the direction of the king.