The idea of Abrahamic religion is usually tied up with the notion of Abraham as the first monotheist. To the best-selling author Bruce Feiler, Abraham was “the first person to understand that there is only one God,” and this insight is “the shared endowment of the Abrahamic faiths.”
But the familiar image of Abraham as the discoverer of the true God and the uncompromising opponent of idolatry isn’t found in Genesis or anywhere else in the Hebrew Bible. It is an idea that originated in Judaism after most of the Hebrew Bible had been composed, and from there it spread into the literature of the Talmudic rabbis and later into the Quran, forming an important commonality between Judaism and Islam.