Sahih Bukhari 5062

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ حَدَّثَنَا شُعْبَةُ عَنْ عَبْدِ الْمَلِكِ بْنِ مَيْسَرَةَ عَنْ النَّزَّالِ بْنِ سَبْرَةَ عَنْ عَبْدِ اللَّهِ أَنَّهُ سَمِعَ رَجُلًا يَقْرَأُ آَيَةً سَمِعَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خِلَافَهَا فَأَخَذْتُ بِيَدِهِ فَانْطَلَقْتُ بِهِ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ : كِلَاكُمَا مُحْسِنٌ فَاقْرَءَا أَكْبَرُ عِلْمِي قَالَ : فَإِنَّ مَنْ كَانَ قَبْلَكُمُ اخْتَلَفُوا فَأَهْلَكَهُمْ .

Narrated `Abdullah: That he heard a man reciting a Quranic Verse which he had heard the Prophet reciting in a different way. So he took that man to the Prophet (and told him the story). The Prophet said, Both of you are reciting in a correct way, so carry on reciting. The Prophet further added, The nations which were before you were destroyed (by Allah) because they differed.