Surah Al-A'raf, ayah 204

وَإِذَا قُرِئَ ٱلۡقُرۡءَانُ فَٱسۡتَمِعُواْ لَهُۥ وَأَنصِتُواْ لَعَلَّكُمۡ تُرۡحَمُونَ ٢٠٤

Wa idhā quri'al-qur'ānu fastami'ū lahū wa ansitū la'allakum turhamūn

So when the Qur’ān is recited, then listen to it and pay attention that you may receive mercy.