This thesis explores the concept of the oneness of God (Allah) and the notion of shirk, the unforgivable sin, as portrayed in the ancient scriptures of the Old Testament, the Gospels (without the Pauline Doctrine), and the Quran alone.
By analyzing these primary sources, the study aims to shed light on the theological perspectives of Judaism, Christianity, and Islam concerning the belief in monotheism and the prohibition of associating partners with God.