12 and said unto them, Ye are the heads of the fathers' [houses] of the Levites: sanctify yourselves, both ye and your brethren, that ye may bring up the ark of Jehovah, the God of Israel, unto [the place] that I have prepared for it. 13 For because ye [bare it] not at the first, Jehovah our God made a breach upon us, for that we sought him not according to the ordinance. 14 So the priests and the Levites sanctified themselves to bring up the ark of Jehovah, the God of Israel. 15 And the children of the Levites bare the ark of God upon their shoulders with the staves thereon, as Moses commanded according to the word of Jehovah. 16 And David spake to the chief of the Levites to appoint their brethren the singers, with instruments of music, psalteries and harps and cymbals, sounding aloud and lifting up the voice with 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