And they brought it. — The text has undoubtedly suffered here through the repetition of a line by the scribes. The whole verse is omitted in the parallel passage in 1 Chronicles 13, and the first half of it (which is a repetition of 2 Samuel 6:3) in the LXX.
Related Commentaries of 2 Samuel 6:4
2 Samuel 6:4
4 And they brought it out of the house of Abinadab which was at Gibeah, accompanyingb the ark of God: and Ahio went before the ark.