The issue of Tahreef [tampering] has been a matter of disagreement between many classical Shia scholars. It has been mentioned that the likes of Muhammad Baqir Majlisi (author of Bihar al-Anwar), Muhammad ibn Ya'qub al-Kulayni (author of Kitab al-Kafi), Ni'matullah Al Jazaa'iri (author of Anwar Al Nu'maniyyah, d. 1701[1]) and Al Ayyaashi (author of Tafsir Ayyashi) among others were of the view that the present Qur'an is not the same as was revealed to Muhammad ibn Abdullah and omission/corruption has taken place.