2 Samuel 3:1-3

Now there was a long war between the house of Saul and the house of David; and David became steadily stronger, while the house of Saul became steadily weaker.

Sons were born to David in Hebron: his firstborn was Amnon, by Ahinoam the Jezreelitess;

and his second, Chileab, by Abigail the widow of Nabal the Carmelite; and the third, Absalom the son of Maacah, the daughter of Talmai, king of Geshur;