31 And the war was long between the house of Saul and the house of David; but David became continually stronger, and the house of Saul became continually weaker.
2 And to David were sons born in Hebron: his firstborn was Amnon, of Ahinoam the Jizreelitess; 3 and his second, Chileab, of Abigail the wife of Nabal the Carmelite; and the third, Absalom the son of Maachah, daughter of Talmai king of Geshur; 4 and the fourth, Adonijah the son of Haggith; and the fifth, Shephatiah the son of Abital; 5 and the sixth, Ithream, of Eglah David's wife. These were born to David in Hebron.
6 And it came to pass while there was war between the house of Saul and the house of David, that Abner made himself strong for the house of Saul.
Matthew Henry's Commentary on 2 Samuel 3:1-6
Commentary on 2 Samuel 3:1-6
(Read 2 Samuel 3:1-6)
The length of this war tried the faith and patience of David, and made his settlement at last the more welcome. The contest between grace and corruption in the hearts of believers, may fitly 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.