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كتاب فضائل القرآن
66  
Virtues of the Qur'an
(37)
Chapter: Recite the Qur'an together as long as you agree about its interpretation
(37)
باب اقْرَءُوا الْقُرْآنَ مَا ائْتَلَفَتْ قُلُوبُكُمْ
Sahih al-Bukhari 5062

Narrated `Abdullah:

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

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ الْمَلِكِ بْنِ مَيْسَرَةَ، عَنِ النَّزَّالِ بْنِ سَبْرَةَ، عَنْ عَبْدِ اللَّهِ، أَنَّهُ سَمِعَ رَجُلاً، يَقْرَأُ آيَةً، سَمِعَ النَّبِيَّ صلى الله عليه وسلم خِلاَفَهَا، فَأَخَذْتُ بِيَدِهِ فَانْطَلَقْتُ بِهِ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ ‏ "‏ كِلاَكُمَا مُحْسِنٌ فَاقْرَآ ـ أَكْبَرُ عِلْمِي قَالَ ـ فَإِنَّ مَنْ كَانَ قَبْلَكُمُ اخْتَلَفُوا فَأَهْلَكَهُمْ ‏"‏‏.‏
Reference : Sahih al-Bukhari 5062
In-book reference : Book 66, Hadith 87
USC-MSA web (English) reference : Vol. 6, Book 61, Hadith 582
  (deprecated numbering scheme)