Absalom in Fausset's Bible Dictionary

("father of peace".) Third son of David, by Maachah, daughter of Talmai, king of Geshur, a Syrian region N.E. of Israel, near lake Merom. Polygamy bore its fatal fruits in engendering jealousies among the families by different wives, each with a separate, establishment (2 Samuel 13:8; 2 Samuel 14:24), and in fostering David's own lust, which broke forth in the sad adultery with Bathsheba. Absalom, the fruit of David's polygamy, was made the divine instrument of David's punishment. Amnon, the half brother, violated Tamar, Absalom's whole sister. David, though very wroth, would not punish Amnon, because he was his firstborn by Ahinoam the Jezreelitess. As Simeon and Levi avenged on Hamor their sister Dinah's violation, so Absalom after two years' dark, silent hatred, took vengeance on Amnon at a sheepshearing feast at Baal Hazor to which he invited all the king's sons (2 Samuel 13). Then he fled to his father-in-law at Geshur for three years. Joab perceiving how the king took to heart Absalom's exile suborned a woman of Tekoa, by an imaginary case, to extort from the king (whose justice would not allow his love for Absalom to let him escape some penalty for Amnon's murder) the admission of the general principle that, in special cases where the life taken could not be recalled, means for restoring the loved and living banished one should be devised; just as God, considering the brevity of man's life, weak and irrecoverable when gone, "as water spilt on the ground, does not take a (sinner's) soul away" (so the Hebrew text of 2 Samuel 14:14 for "neither doth God respect any person"), but deviseth means that His banished be not (for ever) expelled from Him." David yielded, but would not see Absalom, though living at Jerusalem, for two more years. Impatient of delay in his ambitious schemes, he sent for Joab, and, not being heeded, he burnt Joab's grain (as Samson did to the Philistines, Judges 15:4), which drove Joab to intercede with David for Absalom's admission to his presence. possibly he feared the succession of Bathsheba's son to the throne, to which he had the title, being alone of royal descent by his mother's side, also the oldest surviving son (Amnon being slain, and Chileab or Daniel dead, as his name does not occur after 2 Samuel 3:3)...

Link: https://bible-history.com/faussets/A/Absalom/