Sayyiduna Abdullah (may Allah be pleased with him) narrates: I heard a man reciting a verse; the Prophet (peace and blessings be upon him) had taught me to recite that verse, but that man was reciting it in a different manner. I went to the Prophet (peace and blessings be upon him) while he was whispering something to Sayyiduna Ali (may Allah be pleased with him). I mentioned this matter to him, so Sayyiduna Ali (may Allah be pleased with him) turned towards us and said: Indeed, the Messenger of Allah has commanded you people to recite in the manner in which you have been taught.
Hadith Referenceصحیح ابن حبان / كتاب الرقائق / 746
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيحسن - «الصحيحة» (1522).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده حسن عاصم -وهو ابن أبي النجود- روى له البخاري ومسلم متابعة، وهو صدوق حسن الحديث، وباقي رجاله ثقات رجال الشيخين.