What did the Prophet Muhammad (saw) say when he saw two people reciting the same Quranic verse in different ways?
 Narrated Ibn Mas`ud:                     I heard a person reciting a (Qur'anic) Verse in a certain way, and I had heard the Prophet reciting the same Verse in a different way. So I took him to the Prophet and informed him of that but I noticed the sign of disapproval on his face, and then he said, "Both of you are correct, so don't differ, for the nations before you differed, so they were destroyed."