The Quran is the perfect and unaltered word of God, and there is no evidence of textual corruption.

The Quranic verse Surah 15:91 explicitly mentions those who 'made the Quran into shreds,' indicating that even at the time of Muhammad, there were attempts to alter the text. This admission from the Quran itself contradicts the claim of its perfect preservation. Furthermore, historical accounts, such as those from Islamic scholar Alphonse Mingana, highlight that changes in the recitation of Quranic verses were noted during Muhammad's life due to his illiteracy and reliance on others for transcription. After Muhammad's death, the compilation of the Quran under Caliph Uthman involved the destruction of competing codices, further suggesting that variations existed among early Muslims. The reliance on a single compiler, Zaid, raises questions about the authenticity and consistency of the Quranic text, especially given the reported defects in memory among early followers of Muhammad.