Quranic verses when being interpreted precisely and accurately is put in its historic occasion and studied. But if this neglected, it is interpreted in a different and contradictory manner. One of the verses that have been interpreted incorrectly, as a result of neglecting historic occasion of its revelation is the verse of mass. In this article we give an appropriate and true interpretation by explaining the historic occasion of its descent. The meaning of (la yamassuhu ilIal mutahharun 79 Vaqia) is that before revelation to Mohammad (PBUH), nobody accesses the Quran except angels. In this verse the claim of Mecca polytheists on Quran descent to him by Devils and linns is denied.
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