Deuteronomy 19:12

then the elders of his city shall send and bring him away from there and deliver him into the hand of the avenger of blood so that he may die.

1 Kings 2:5-6

And also you know what Joab the son of Zeruiah did to me, what he did to the two commanders of the armies of Israel, to Abner the son of Ner, and to Amasa the son of Jether, that he murdered them, and shed the blood of war in peace, and put the blood of war upon his girdle on his loins, and in his shoes on his feet.

1 Kings 2:28-34

And the report came to Joab. For Joab had turned after Adonijah, though he did not turn after Absalom. And Joab fled to the tabernacle of Jehovah, and caught hold on the horns of the altar.

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