Sahih Bukhari, Chapter: Quarrels

I heard a man reciting a verse (of the Holy Quraan) but I had heard the Prophet (SAW) reciting it differently. So, I caught hold of the man by the hand and took him to Allah's Apostle (SAW) who said, "Both of you are right." Shu'ba, the sub-narrator said, "I think he said to them, "Don't differ, for the nations before you differed and perished (because of their differences)."