سورة Al-Araf 7:204

وَإِذَا قُرِئَ ٱلْقُرْءَانُ فَٱسْتَمِعُوا۟ لَهُۥ وَأَنصِتُوا۟ لَعَلَّكُمْ تُرْحَمُونَ ٢٠٤

When the Quran is recited, listen to it attentively and be silent, so you may be shown mercy