I Chronicles 25:2-3

Of the sons of Asaph: Zaccur, Joseph, Nethaniah, and Asharelah; the sons of Asaph were under the direction of Asaph, who prophesied according to the order of the king. Of Jeduthun, the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah, six, under the direction of their father Jeduthun, who prophesied with a harp to give thanks and to praise the LORD.