إِنَّ الَّذِينَ يَغُضُّونَ أَصْوَاتَهُمْ عِندَ رَسُولِ اللَّهِ أُوْلَئِكَ الَّذِينَ امْتَحَنَ اللَّهُ قُلُوبَهُمْ لِلتَّقْوَى لَهُم مَّغْفِرَةٌ وَأَجْرٌ عَظِيمٌ
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سورة الحُـجُـرات
(49/3) Surely those who lower their voices in the presence of the Messenger of Allah are they whose hearts Allah have tested for the Piety (Takwâ). For them are Forgiveness and a Great Wage.
Surah Al-Hujurat