2 Samuel 3:1-3

1There was a long war between the house of Saul and the house of David; but David grew steadily stronger, while the house of Saul grew weaker and weaker [to the point of being powerless].

2Sons were born to David in Hebron: his firstborn was Amnon, by Ahinoam of Jezreel;

3his second, Chileab, by Abigail the widow of Nabal of Carmel; the third, Absalom the son of [his wife] Maacah, daughter of Talmai the king of Geshur;