Quran 7:204 from Surah Al-A'raaf on Divine Marvels.
وَإِذَا قُرِئَ ٱلۡقُرۡءَانُ فَٱسۡتَمِعُواْ لَهُۥ وَأَنصِتُواْ لَعَلَّكُمۡ تُرۡحَمُونَ
English translation: And when is recited the Quran then listen to it and pay attention so that you may receive mercy
Transliteration: wa-idha quri-a al-qur'anu fa-is'tami'u lahu wa-ansitu la'allakum tur'hamuna