34 Meanwhile Absalom escaped. Then the watchman on the Jerusalem wall saw a great crowd coming down the hill on the road from the west. He ran to tell the king, "I see a crowd of people coming from the Horonaim road along the side of the hill." 35 "Look!" Jonadab told the king. "There they are now! The king's sons are coming, just as I said." 36 They soon arrived, weeping and sobbing, and the king and all his servants wept bitterly with them. 37 And David mourned many days for his son Amnon. Absalom fled to his grandfather, Talmai son of Ammihud, the king of Geshur. 38 He stayed there in Geshur for three years.
Matthew Henry's Commentary on 2 Samuel 13:34-38
Commentary on 2 Samuel 13:30-39
(Read 2 Samuel 13:30-39)
Jonadab was as guilty of Ammon's death, as of his sin; such false friends do they prove, who counsel us to do wickedly. Instead of loathing Absalom as a murderer, David, after a time, longed to go forth to him. This was David's infirmity: God saw something in his heart that made a difference, else we should have thought that he, as much as Eli, honoured his sons more than God.