And when Abner returned to Hebron, Joab took him aside into the inner part of the gate to speak with him privately, and struck him there in the abdomen, and he died on account of the blood of Asahel his brother.
“he died on account of the blood of Asahel his brother.” This gives us at least one reason Joab killed Abner; the ancient right of the avenger of blood and the blood feud. Although Abner killed Joab’s brother Asahel in a war, the fact still remains he killed Joab’s brother, and Joab would not forgive it.
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