Biblical war begins for the sake of a brother taken captive

Evidence

What is important here is the cause and reason that the biblical text offers regarding Abraham’s involvement in a war that did not concern him. War, here the war of conquest, begins for what is after all a simple reason. Abraham, says the text, went to war, went in pursuit of his enemies, be- cause of-but precisely, because of whom? — Gil Anidjar, The Jew, the Arab, 326