For the king's household to ride on; for the king and his wives and children were all on foot; not that he had not or could not procure asses for them at Jerusalem, but because he chose it as best becoming that state of penitence and humiliation in which they were.
Related Commentaries of 2 Samuel 16:2
2 Samuel 16:2
2 And the king said unto Ziba, What meanest thou by these? And Ziba said, The asses be for the king's household to ride on; and the bread and summer fruit for the young men to eat; and the wine, that such as be faint in the wilderness may drink.