Christian-Islamic Disputes concerning the History of the idea of Bible Falsification

The History of the ideas are considered as the new branches of historiography investigating the historical events by relying on thoughts and instructions. In this writing, the history of development of Islamic instruction related to the falsification of Bible including (old and new testament) has been investigated resembling a presumption. The sources of this research are mostly Christians and some times Islamic-Christian belonging to the first three Islamic centuries in which the various criticisms of Muslims towards Christians has been raised and answered. On the basis of some documents, the criterion presumption among Muslims has been the presumption of authenticity of Bible until the era of Haroon al- Rashid and based on the other sources, the earliest time that Muslims paid attention to the falsification of Bible goes back to the beginning of Abbasid era and the presumption of falsification has been stated in a very elementary and vague way in time of Mahdi Abbasi. It is only after the time of Ma’moon caliphate when the advent of this idea can be clearly observed