From Sahih Bukhari (Hadith 2410):
Narrated `Abdullah:I heard a man reciting a verse (of the Holy Qur'an) but I had heard the Prophet (ﷺ) reciting it differently. So, I caught hold of the man by the hand and took him to Allah's Messenger (ﷺ) 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)
Reference: Bukhari 2410