2 Samuel 3:27; 2 Samuel 3:30

2 Samuel 3:27

27 Now when Abner returned to Hebron, Joab took him aside into an inner chamber, as if to speak with him privately. And there, to avenge the blood of his brother Asahel, Joab stabbed him in the stomach, and he died.

2 Samuel 3:30

30 (Joab and his brother Abishai murdered Abner because he had killed their brother Asahel in the battle at Gibeon.)