1 Chronicles 15:13-17

Because you did not carry it at the first, the Lord our God made an outburst against us, since we did not seek Him according to the ordinance.”

So the priests and the Levites consecrated themselves to bring up the ark of the Lord God of Israel.

The sons of the Levites carried the ark of God on their shoulders with the poles on them, just as Moses had commanded in accordance with the word of the Lord.

Then David spoke to the chiefs of the Levites to appoint their relatives as the singers, with musical instruments, harps, lyres, and cymbals, playing to raise sounds of joy.

So the Levites appointed Heman the son of Joel, and from his relatives, Asaph the son of Berechiah; and from the sons of Merari their relatives, Ethan the son of Kushaiah,