Surah Al-Hujurat, Verse 3

إِنَّ ٱلَّذِينَ يَغُضُّونَ أَصۡوَٰتَهُمۡ عِندَ رَسُولِ ٱللَّهِ أُوْلَٰٓئِكَ ٱلَّذِينَ ٱمۡتَحَنَ ٱللَّهُ قُلُوبَهُمۡ لِلتَّقۡوَىٰۚ لَهُم مَّغۡفِرَةࣱ وَأَجۡرٌ عَظِيمٌ ﴿٣﴾

İnnellezıne yeğuddune asvatehüm ınde rasulillahi ülaikel lezınemtehanellahü kulubehüm lit takva lehüm mağfiratüv ve ecrun azıym

“Those that lower their voices in the presence of God's Apostle,- their hearts has God tested for piety: for them is Forgiveness and a great Reward”