The Shi`ah vehemently deny tahrif of the Qur'an...
The Shi`ah vehemently deny tahrif of the Qur'an, believing that the Qur'an is the book on the basis of which all our beliefs and traditions (in order to know their authenticity or otherwise) must be presented, and the standard of the Islamic system. Keeping this importance of the Qur'an, if tahrif had really occurred in it, the infallible Imams ( 'a ), who are the true guardians and protectors of the religion after the Prophet (s), would definitely have pointed it out.
In view of the proofs of the Shi`ah indicating the absence of tahrif , that group of the Sunni 'ulama ' which believes in tahrif of the Qur'an would have to attribute the occurrence of tahrif to the first three caliphs because the Qur'an was compiled during their reigns, and 'Ali ( 'a ) abided by the Qur'an they had compiled.
And know that this Qur'an is indeed an adviser who does not deceive, a leader who does not mislead, and a narrator who does not lie.[^2] This hadith shows the completeness of the Qur'an because the Qur'an could be a good guide, truthful adviser and similar descriptions only if it had not experienced any form of distortion. The viewpoint of a number of jurists {fuqaha} The Shi`ah 'ulama' and maraji' al-taqlid generally reject the belief in tahrif .
The works that have been written on this subject are so many that mentioning them is not an easy task and would need a separate section. Now, for the sake of information, it will suffice to mention some of them below: Ayatullah Riya' ad-Din Araki, Al-Usul , vol. 3, p. 93; Ayatullah Musawi Bujnurdi, Muntahi'l-Usul , vol. 2, p. 81; Firuzabadi, 'Inayah al-Usul , vol. 3, p. 120; and Akhund Khurasani, Kifayah al-Usul , vol. 2, p. 63.