Sahih Bukhari
Hadith #4536
Narrated Ibn Az-Zubair:I said to `Uthman, ""This Verse which is in Surat-al-Baqara: ""Those of you who die and leave widows behind...without turning them out."" has been abrogated by another Verse. Why then do you write it (in the Qur'an)?"" `Uthman said. ""Leave it (where it is), O the son of my brother, for I will not shift anything of it (i.e. the Qur'an) from its original position