2 Samuel 3:27 (KJV)

Thou knowest Abner the son of Ner, that he came to deceive thee, and to know thy going out and thy coming in, and to know all that thou doest.

And when Joab was come out from David, he sent messengers after Abner, which brought him again from the well of Sirah: but David knew it not.

And when Abner was returned to Hebron, Joab took him aside in the gate to speak with him quietly, and smote him there under the fifth rib, that he died, for the blood of Asahel his brother.

And afterward when David heard it, he said, I and my kingdom are guiltless before the Lord for ever from the blood of Abner the son of Ner:

Let it rest on the head of Joab, and on all his father’s house; and let there not fail from the house of Joab one that hath an issue, or that is a leper, or that leaneth on a staff, or that falleth on the sword, or that lacketh bread.