1 Chronicles 25:1-3

Moreover, David and the commanders of the army set apart for the service some of the sons of Asaph, Heman, and Jeduthun, who were to prophesy with lyres, harps, and cymbals; and the number of those who performed this service was:

Of the sons of Asaph: Zaccur, Joseph, Nethaniah, and Asharelah; the sons of Asaph were under the direction of Asaph, who prophesied under the direction of the king.

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