King David and the leaders of the Levites chose the following Levite clans to lead the worship services: Asaph, Heman, and Jeduthun. They were to proclaim God's messages, accompanied by the music of harps and cymbals. This is the list of persons chosen to lead the worship, with the type of service that each group performed:

The six sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah. Under the direction of their father they proclaimed God's message, accompanied by the music of harps, and sang praise and thanks to the LORD.

All of his sons played cymbals and harps under their father's direction, to accompany the Temple worship. And Asaph, Jeduthun, and Heman were under orders from the king.

O LORD, I will always sing of your constant love; I will proclaim your faithfulness forever.

From the clans of singers they chose the following men to play the brass cymbals: Heman son of Joel, his relative Asaph son of Berechiah, and Ethan son of Kushaiah, of the clan of Merari. To assist them they chose the following Levites to play the high-pitched harps: Zechariah, Jaaziel, Shemiramoth, Jehiel, Unni, Eliab, Maaseiah, and Benaiah. To play the low-pitched harps they chose the following Levites: Mattithiah, Eliphelehu, Mikneiah, Azaziah, and the Temple guards, Obed Edom and Jeiel.