إِنَّ ٱلَّذِينَ يَغُضُّونَ أَصْوَٰتَهُمْ عِندَ رَسُولِ ٱللَّهِ أُو۟لَـٰٓئِكَ ٱلَّذِينَ ٱمْتَحَنَ ٱللَّهُ قُلُوبَهُمْ لِلتَّقْوَىٰ ۚ لَهُم مَّغْفِرَةٌ وَأَجْرٌ عَظِيمٌ Qur’an Al-Hujurat (49:3)Inna allatheena yaghuddoona aswatahum AAinda rasooli Allahi olaika allatheena imtahana Allahu quloobahum lilttaqwa lahum maghfiratun waajrun AAatheemun
The essence of good manners arises from the heart. The man who really and sincerely respects his Leader has true piety in his heart, just as the man who does the opposite may undo the work of years by weakening the Leader's authority.