2 Samuel 3:27-29

When Abner arrived at Hebron, Joab took him aside into the gateway. He acted as though he wanted to talk with Abner in private, but Joab stabbed him in the stomach, and Abner died. Abner had killed Joab’s brother Asahel, so Joab killed Abner to pay him back. Later when David heard the news, he said, “My kingdom and I are innocent forever of the death of Abner son of Ner. The LORD knows this. Joab and his family are responsible for this. May his family always have someone with sores or with a skin disease. May they always have someone who must lean on a crutch. May some of his family be killed in war. May they always have someone without food to eat.”