Quran, Sources of ...

1. The Old Testament (canonical and apocryphal)
2. The New Testament (canonical and apocryphal) and various heretical doctrines.
3. Sabaism, a combination of Judaism, Manicheism, and old disfigured Babylonian heathenism.
4. Zoroastrianism
5. Hanifsm (Waraqah ibn Nawfal)
6. Native ancient and contemporary Arabian heathen beliefs and practices