Also the Levites which were the singers, all of them of Asaph, of Heman, of Jeduthun, with their sons and their brethren, being arrayed in white linen, having cymbals and lyres and harps, stood at the east end of the altar, and with them a hundred and twenty priests sounding with trumpets:)

And of the sons of Heman; Jehuel, and Shimei: and of the sons of Jeduthun; Shemaiah, and Uzziel.

And the singers the sons of Asaph were in their place, according to the commandment of David, and Asaph, and Heman, and Jeduthun the king's seer; and the gatekeepers waited at every gate; they did not need to depart from their service; for their brethren the Levites prepared for them.