1 Chronicles 25:1-3

The Voice

25 David and the heads of the Levites, also known as the commanders of the army, selected for the service some of the sons of Asaph, Heman, and Jeduthun. These men were expected to serve in the temple by prophesying with lyres, harps, and cymbals. These are the singers who performed these duties in order of their descent. ² The sons of Asaph (Zaccur, Joseph, Nethaniah, and Asharelah) were directed by Asaph who prophesied because the king appointed him that duty. ³ The six sons of Jeduthun (Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah) were directed by their father Jeduthun who used the harp to prophesy, as well as to testify about the Eternal.