إِنَّ الَّذِينَ يَغُضُّونَ أَصْوَاتَهُمْ عِندَ رَسُولِ اللَّهِ أُولَٰئِكَ الَّذِينَ امْتَحَنَ اللَّهُ قُلُوبَهُمْ لِلتَّقْوَىٰ ۚ لَهُم مَّغْفِرَةٌ وَأَجْرٌ عَظِيمٌ (3)
(49:3) The ones who lower their voices in the presence of the Messenger of Allah are those whose hearts Allah has tested for God-fearing. *5 Theirs shall be forgiveness and a great reward.
*5) That is, "Only those people give due reverence to the Messenger of Allah, who have passed successfully through the tests and trials set by Allah and proved by their steadfastness that their hearts indeed possess tagva (piety). " From this it follows automatically that the heart which is devoid of reverence for the Holy Prophet is, in fact, devoid of tagva, and a person's raising his voice louder than the Holy Prophet's is not only an uncivilized act outwardly but also a sign of the absence of tagva in his heart.