Then the king said to Ziba, “Behold, all that belonged to Mephibosheth is now yours.” And Ziba said, “I pay homage; let me ever find favor in your sight, my lord the king.”
We read before how kind David was to Mephibosheth the son of Jonathan, how he prudently entrusted his servant Ziba with the management of his estate, while he generously entertained him at his own table, Sa2 9:10. This matter was well settled; but, it seems, Ziba is not content to be manager, he longs to be master, of Mephibosheth's estate.
Commenting on 2 Samuel 16:1-4
Then said the king to Ziba, behold, thine are all that pertaineth to Mephibosheth,.... Being forfeited to the king by an overt act of treason as they had been before by the rebellion of Ishbosheth, but had been graciously restored to Mephibosheth; and had it been true what Ziba suggested, it would have been a righteous thing to have taken them from him; though it...
Thine are all - This conduct of David was very rash; he spoiled an honorable man to reward a villain, not giving himself time to look into the circumstances of the case. But David was in heavy afflictions, and these sometimes make even a wise man mad.