Albert Barnes Commentary 1 Chronicles 15:13

"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." — 1 Chronicles 15:13 (ASV)

The “due order” was that the ark should be carried on the shoulders of Kohathite Levites—not that it should be placed on a cart, drawn by oxen, and rudely shaken.