Quran 49:2 from Surah Al-Hujuraat on Divine Marvels.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا تَرۡفَعُوٓاْ أَصۡوَٰتَكُمۡ فَوۡقَ صَوۡتِ ٱلنَّبِيِّ وَلَا تَجۡهَرُواْ لَهُۥ بِٱلۡقَوۡلِ كَجَهۡرِ بَعۡضِكُمۡ لِبَعۡضٍ أَن تَحۡبَطَ أَعۡمَٰلُكُمۡ وَأَنتُمۡ لَا تَشۡعُرُونَ
English translation: O (you who) (O) you who believe (Do) not raise your voices above (the) voice (of) the Prophet and (do) not be loud to him in speech like (the) loudness (of) some of you to others lest become worthless your deeds while you (do) not perceive
Transliteration: yaayyuha alladhina amanu la tarfa'u aswatakum fawqa sawti al-nabiyi wala tajharu lahu bil-qawli kajahri ba'dikum liba'din an tahbata a'malukum wa-antum la tash'uruna