chasting or dischasting of quran and scriptures predicates

one of the most important principles in understanding and interpretation of quran, torah and bible is believing infallibility of these scriptures. if the verses (ayat) and expressions of scriptures during the prosses of sinking and over the time underwent contradictions and incompatibility, no one would trust them anymore and then it would be something like human speech. for the aspects of authenticity of holy textures, preservation and keeping them from any mistakes can be mentioned. according to these baselines, understanding the scriptures, you will not anticipate anything except harmony among the texts. in this article, besides mentioning different views in this regard, we concluded that infallibility of holy textures is the prevailing view of muslims and jewish tradition, but among christians there is disagreement.