12 He said to them, "You are the leaders of the Levite families. You must purify yourselves and all your fellow Levites, so you can bring the Ark of the Lord, the God of Israel, to the place I have prepared for it. 13 Because you Levites did not carry the Ark the first time, the anger of the Lord our God burst out against us. We failed to ask God how to move it properly." 14 So the priests and the Levites purified themselves in order to bring the Ark of the Lord, the God of Israel, to Jerusalem. 15 Then the Levites carried the Ark of God on their shoulders with its carrying poles, just as the Lord had instructed Moses. 16 David also ordered the Levite leaders to appoint a choir of Levites who were singers and musicians to sing joyful songs to the accompaniment of harps, lyres, and cymbals.
Matthew Henry's Commentary on 1 Chronicles 15:12-16
Commentary on 1 Chronicles 15:1-24
(Read 1 Chronicles 15:1-24)
Wise and good men may be guilty of oversights, which they will correct, as soon as they are aware of them. David does not try to justify what had been done amiss, nor to lay the blame on others; but he owns himself guilty, with others, of not seeking God in due order