The length of the war between Israel's first king Saul, and David, tried David's faith and patience, and made his settlement at last the more welcome. The contest between grace and corruption in the hearts of believers, may aptly be compared to this warfare. There is a long war between them, the flesh lusting against the spirit, and the spirit against the flesh; but as the work of holiness is carried on, corruption, like the house of Saul, grows weaker and weaker; while grace, like the house of David, grows stronger and stronger.
David's third son, Absalom, was born in Hebron, the son of Maacah daughter of Talmai king of Geshur.
His sister Tamar had been raped by David's eldest son, Amnon, who was in love with her. Absalom, after waiting two years, revenged by sending his servants to murder Amnon at a feast to which he had invited all the king's sons:
23 After two full years Absalom had sheepshearers at Baal-hazor, which is near Ephraim, and Absalom invited all the king's sons. 24 And Absalom came to the king and said, "Behold, your servant has sheepshearers. Please let the king and his servants go with your servant." –2 Samuel 13:23-24
(includes video Eric Whitacre When David Heard Part 1 & 2)