Moreover David and the captains of the army separated for the service some of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with lyres, and with cymbals: and the number of the workmen according to their service was:
Of Jeduthun: the sons of Jeduthun; Gedaliah, and Zeri, and Jeshaiah, Shemei, Hashabiah, and Mattithiah, six, under the hands of their father Jeduthun, who prophesied with a harp, to give thanks and to praise the LORD.
All these were under the direction of their father in the music in the house of the LORD, with cymbals, lyres, and harps, for the service of the house of God, according to the king’s order to Asaph, Jeduthun, and Heman.
And they gathered their brethren, and sanctified themselves, and came, according to the commandment of the king, by the words of the LORD, to cleanse the house of the LORD.