a religion of which traces its foundation back to Abraham

In the study of comparative religion, an Abrahamic religion is any religion deriving from a common ancient Semitic tradition and traced by their adherents to Abraham ("Father/Leader of many" Hebrew אַבְרָהָם ("Avraham") Arabic ابراهيم ("Ibrahim"), a patriarch whose life is narrated in the Hebrew Bible/Old Testament, and as a prophet in the Qur'an and also called a prophet in Genesis 20:7. This forms a large group of largely monotheistic religions, including Judaism, Christianity, Islam and the Bahá'í Faith. Abrahamic religions account for more than half Preston Hunter, http://www.adherents.com/Religions_By_Adherents.html Major Religions of the World Ranked by Number of Adherents of the world's total religious adherents.