[وَقُل لِّلْمُؤْمِنَـتِ يَغْضُضْنَ مِنْ أَبْصَـرِهِنَّ وَيَحْفَظْنَ فُرُوجَهُنَّ وَلاَ يُبْدِينَ زِينَتَهُنَّ إِلاَّ مَا ظَهَرَ مِنْهَا وَلْيَضْرِبْنَ بِخُمُرِهِنَّ عَلَى جُيُوبِهِنَّ وَلاَ يُبْدِينَ زِينَتَهُنَّ إِلاَّ لِبُعُولَتِهِنَّ أَوْ ءَابَآئِهِنَّ أَوْ ءَابَآءِ بُعُولَتِهِنَّ أَوْ أَبْنَآئِهِنَّ أَوْ أَبْنَآءِ بُعُولَتِهِنَّ أَوْ إِخْوَانِهِنَّ أَوْ بَنِى إِخْوَانِهِنَّ أَوْ بَنِى أَخَوَتِهِنَّ أَوْ نِسَآئِهِنَّ أَوْ مَا مَلَكَتْ أَيْمَـنُهُنَّ أَوِ التَّـبِعِينَ غَيْرِ أُوْلِى الإِرْبَةِ مِنَ الرِّجَالِ أَوِ الطِّفْلِ الَّذِينَ لَمْ يَظْهَرُواْ عَلَى عَوْرَتِ النِّسَآءِ وَلاَ يَضْرِبْنَ بِأَرْجُلِهِنَّ لِيُعْلَمَ مَا يُخْفِينَ مِن زِينَتِهِنَّ وَتُوبُواْ إِلَى اللَّهِ جَمِيعاً أَيُّهَ الْمُؤْمِنُونَ لَعَلَّكُمْ تُفْلِحُونَ ]
(31. And tell the believing women to lower their gaze, and protect their private parts and not to show off their adornment except that which is apparent, and to draw their veils all over their Juyub and not to reveal their adornment except to their husbands, or their fathers, or their husband’s fathers, or their sons, or their husband’s sons, or their brothers or their brother’s sons, or their sister’s sons, or their women, or their right hand possessions, or the Tabi`in among men who do not have desire, or children who are not aware of the nakedness of women. And let them not stamp their feet so as to reveal what they hide of their adornment. And all of you beg Allah to forgive you all, O believers, that you may be successful.)
Allah’s saying:
[وَلاَ يَضْرِبْنَ بِأَرْجُلِهِنَّ]
(And let them not stamp their feet…) During Jahiliyyah, when women walked in the street wearing anklets and no one could hear them, they would stamp their feet so that men could hear their anklets ringing. Allah forbade the believing women to do this. By the same token, if there is any other kind of adornment that is hidden, women are forbidden to make any movements that would reveal what is hidden, because Allah says:
[وَلاَ يَضْرِبْنَ بِأَرْجُلِهِنَّ]
(And let them not stamp their feet…) to the end of it. From that, women are also prohibited from wearing scent and perfume when they are going outside the home, lest men should smell their perfume. Abu `Isa At-Tirmidhi recorded that Abu Musa, may Allah be pleased with him, said that the Prophet said:
«كُلُّ عَيْنٍ زَانِيَةٌ، وَالْمَرْأَةُ إِذَا اسْتَعْطَرَتْ فَمَرَّتْ بِالْمَجْلِسِ فَهِيَ كَذَا وَكَذَا»
(Every eye commits fornication and adultery, and when a woman puts on perfume and passes through a gathering, she is such and such) — meaning an adulteress. He said, “And there is a similar report from Abu Hurayrah, and this is Hasan Sahih.” It was also recorded by Abu Dawud and An-Nasa’i. By the same token, women are also forbidden to walk in the middle of the street, because of what this involves of wanton display. Abu Dawud recorded that Abu Usayd Al-Ansari said that he heard the Messenger of Allah , as he was coming out of the Masjid and men and women were mixing in the street, telling the women:
«اسْتَأْخِرْنَ فَإِنَّهُ لَيْسَ لَكُنَّ أَنْ تَحْقُقْنَ الطَّرِيقَ، عَلَيْكُنَّ بِحَافَّاتِ الطَّرِيقِ»
(Keep back, for you have no right to walk in the middle of the street. You should keep to the sides of the road.) The women used to cling to the walls so much that their clothes would catch on the walls.
[وَتُوبُواْ إِلَى اللَّهِ جَمِيعاً أَيُّهَ الْمُؤْمِنُونَ لَعَلَّكُمْ تُفْلِحُونَ]
(And all of you beg Allah to forgive you all, O believers, that you may be successful.) means, practice what you are commanded in these beautiful manners and praiseworthy characteristics, and give up the evil ways of the people of Jahiliyyah, for the greatest success is to be found in doing what Allah and His Messenger command and avoiding what He forbids. And Allah is the source of strength.
Tafsir Ibn Kathir, Surah An Nur
Islamic Etiquette 