2 Samuel 3:28-30
28 When David heard this news, he wanted it understood:
David: I and my kingdom are guiltless for all time in the eyes of the Eternal of the murder of Abner, son of Ner. 29 May all the guilt fall on Joab and on his descendants. May the men in Joab’s line always have an oozing sore or skin disease, no longer be fit for battle, fall in battle, or go hungry.
30 This was the curse King David pronounced because Joab and his brother Abishai murdered Abner in revenge for their brother Asahel, whom Abner killed at the battle at Gibeon.Read full chapter