12 He said to them, "You are the heads of families of the Levites; sanctify yourselves, you and your kindred, so that you may bring up the ark of the Lord, the God of Israel, to the place that I have prepared for it. 13 Because you did not carry it the first time, the Lord our God burst out against us, because we did not give it proper care." 14 So the priests and the Levites sanctified themselves to bring up the ark of the Lord, the God of Israel. 15 And the Levites carried the ark of God on their shoulders with the poles, as Moses had commanded according to the word of the Lord. 16 David also commanded the chiefs of the Levites to appoint their kindred as the singers to play on musical instruments, on harps and lyres and cymbals, to raise loud sounds of joy.
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