1 Chronicles 25:1-2

Revised Geneva Translation

25 So, David and the captains of the army separated the sons of Asaph and Heman and Jeduthun for the ministry, who would sing prophesies with harps, with viols, and with cymbals. And this is the number of the men for the office of their ministry.

² Of the sons of Asaph were Zaccur and Joseph and Nethaniah and Asharelah. The sons of Asaph were under the hand of Asaph, who sang prophecies by the commission of the king.