32 But Jonadab, the son of David's brother Shimeah, said, "Let not my lord suppose that they have killed all the young men the king's sons; Amnon alone is dead. This has been determined by Absalom from the day Amnon raped his sister Tamar. 33 Now therefore, do not let my lord the king take it to heart, as if all the king's sons were dead; for Amnon alone is dead."
Matthew Henry's Commentary on 2 Samuel 13:32-33
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.