The sons of Zerah: Zimri, Ethan, Heman, Kalkol, Dara ¹  – five in all.

He was wiser than any man, including Ethan the Ezrahite or Heman, Calcol, and Darda, the sons of Mahol. He was famous in all the neighboring nations. ¹ 

David and the army officers selected some of the sons of Asaph, Heman, and Jeduthun to prophesy as they played stringed instruments and cymbals. ¹  The following men were assigned this responsibility: ² 

All of these were under the supervision of their fathers; they were musicians in the Lord’s temple, playing cymbals and stringed instruments as they served in God’s temple. Asaph, Jeduthun, and Heman were under the supervision of the king.

The musicians, the descendants of Asaph, manned their posts, as prescribed by David, Asaph, Heman, and Jeduthun the king’s prophet. ¹  The guards at the various gates did not need to leave their posts, for their fellow Levites made preparations for them.