49:3
إِنَّ ٱلَّذِينَ يَغُضُّونَ أَصْوَٰتَهُمْ عِندَ رَسُولِ ٱللَّهِ أُو۟لَـٰٓئِكَ ٱلَّذِينَ ٱمْتَحَنَ ٱللَّهُ قُلُوبَهُمْ لِلتَّقْوَىٰ ۚ لَهُم مَّغْفِرَةٌ وَأَجْرٌ عَظِيمٌ
inna alladhīna yaghuḍḍūna aṣwātahum ʿinda rasūli l-lahi ulāika alladhīna im'taḥana l-lahu qulūbahum lilttaqwā lahum maghfiratun wa-ajrun ʿaẓīmun
It is those who lower their voices in the presence of God’s Messenger whose hearts God has proved to be aware––they will have forgiveness, and a great reward––
Verily, those who lower their voices in the presence of Allâh’s Messenger (صلى الله عليه وسلم), they are the ones whose hearts Allâh has tested for piety. For them is forgiveness and a great reward.