John Gill's Bible Commentary Ver. 2. Then David said , etc.] Either within himself, or to his ministers and courtiers about him: none ought to carry the ark of God but the Levites ; he saw his former mistake in employing those that were not Levites in bringing up the ark from Kirjathjearim, and bringing it in a cart, and not on the shoulders of the Levites, and so miscarried in his attempt, ( 2 Samuel 6:1) and, perhaps, had since more diligently consulted the law of God about this matter: for them hath the Lord chosen to carry the ark of God, and to minister unto him for ever ; as long as the Levitical dispensation lasted, as appears from ( Numbers 1:50 4:15 7:9).
Matthew Henry Commentary
Verses 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 own himself guilty, with others, of not seeking God in due order
Original Hebrew אז227 אמר559 דויד1732 לא3808 לשׂאת5375 את853 ארון727 האלהים430 כי3588 אם518 הלוים3881 כי3588 בם בחר977 יהוה3068 לשׂאת5375 את853 ארון727 יהוה3068 ולשׁרתו8334 עד5704 עולם׃5769