461/1068) states...

461/1068) states: As to the discussion regarding addition to and deletion from the Qur'an, such a thing does not befit it, because the presence of any addition is negated by consensus, and as to deletion from it, that which is evident from the beliefs of various Islamic schools is a negation of it as well, and this position is best entitled to authentication.

This view has been supported by al-Murtada - may God be pleased with him - and the literal import of traditions, although many traditions have been narrrated both by the Shi`ah (al-Khassah) and Sunnis (al-`Ammah) which speak of deletions in many verses and the change of their place from one location to another in the Qur'an.

But all these traditions are ahad and do not bestow certainty, and therefore it is better to ignore them and to refrain from busying oneself with them, considering that they are capable of being interpreted (in a manner which is not critical of the purity of the Quranic text), even if their authenticity be accepted, because the Quran existing between the two flaps is of known authenticity, not having been challenged or rejected by anyone from the Ummah.

Furthermore, our traditions urge its recitation, require adherence to its contents, and command correlation of contradictory traditions relating to precepts with it, so that that which agrees with it is accepted and that which contradicts it is rejected.

It has been narrated from the Prophet (S) in a tradition that has not been contested by anyone that he (S) said: إني مخلف فيكم الثقليم ما إن تمسكتم بهما لن تضلوا، كتاب الله و عترتي أهل بيتي و إنهما لن يفترقا حتى يردا علي الحوض4-15 I am leaving behind among you two precious things. As long as you adhere to them you will never go astray. (They are) the Book of God and my kindred, my . Verily, the two will never separate until they meet me at the Pond.

This indicates that the Qur'an shall be present in all ages, because it is not possible that the Prophet (S) should command us to adhere to a thing which we are incapable of adhering to, considering that among the (A) he whose word is to be followed is present at all times.