1 Chronicles 25:1-2

1Moreover, David and the commanders of the army set apart for the service some of the sons of 1Asaph and of Heman and of Jeduthun, who were to 2prophesy with lyres, 3harps and cymbals; and the number of 4those who performed their service was:

2Of the sons of Asaph: Zaccur, Joseph, Nethaniah and 5Asharelah; the sons of Asaph were under the 6direction of Asaph, who prophesied under the 7direction of the king.