15 Then the Levites carried the ark of God the way Moses had commanded according to the word of the Lord: on their shoulders with the poles.f

16 Then David told the leaders of the Levites to appoint their relatives as singers and to have them raise their voices with joy accompanied by musical instruments—harps, lyres, and cymbals.g 17 So the Levites appointed Heman son of Joel; from his relatives, Asaph son of Berechiah; and from their relatives the Merarites, Ethan son of Kushaiah.