1 Chronicles 25:2-3

²of the sons of Asaph: Zaccur, and Joseph, and Nethaniah, and Asharelah, the sons of Asaph, under the hand of Asaph, who prophesied after the order of the king. ³Of Jeduthun; the sons of Jeduthun: Gedaliah, and Zeri, and Jeshaiah, Hashabiah, and Mattithiah, six, under the hands of their father Jeduthun with the harp, who prophesied in giving thanks and praising Yahweh.