16:4And he appointed certain of the Levites to minister before the ark of the LORD, and to record, and to thank and praise the LORD God of Israel:

16:5Asaph the chief, and next to him Zechariah, Jeiel, and Shemiramoth, and Jehiel, and Mattithiah, and Eliab, and Benaiah, and Obededom: and Jeiel with psalteries and with harps; but Asaph made a sound with cymbals;

16:6Benaiah also and Jahaziel the priests with trumpets continually before the ark of the covenant of God.

23:5Moreover four thousand were porters; and four thousand praised the LORD with the instruments which I made, said David, to praise therewith.

23:6And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.

25:1Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was: