Albert Barnes Commentary 2 Samuel 19:29

"And the king said unto him, Why speakest thou any more of thy matters? I say, Thou and Ziba divide the land." — 2 Samuel 19:29 (ASV)

Unable to get to the bottom of the story, and perhaps unwilling to make an enemy of Ziba, David compromised the matter by dividing the land, thus partially revoking his hasty sentence (2 Samuel 16:4). We still see the impatient temper of David.