Sura al-Nūr 24:58

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لِيَسْتَـْٔذِنكُمُ ٱلَّذِينَ مَلَكَتْ أَيْمَٰنُكُمْ وَٱلَّذِينَ لَمْ يَبْلُغُوا۟ ٱلْحُلُمَ مِنكُمْ ثَلَٰثَ مَرَّٰتٍ مِّن قَبْلِ صَلَوٰةِ ٱلْفَجْرِ وَحِينَ تَضَعُونَ ثِيَابَكُم مِّنَ ٱلظَّهِيرَةِ وَمِنۢ بَعْدِ صَلَوٰةِ ٱلْعِشَآءِ ثَلَٰثُ عَوْرَٰتٍ لَّكُمْ لَيْسَ عَلَيْكُمْ وَلَا عَلَيْهِمْ جُنَاحٌۢ بَعْدَهُنَّ طَوَّٰفُونَ عَلَيْكُم بَعْضُكُمْ عَلَىٰ بَعْضٍ كَذَٰلِكَ يُبَيِّنُ ٱللَّـهُ لَكُمُ ٱلْأَيَٰتِ وَٱللَّـهُ عَلِيمٌ حَكِيمٌ

yā-ayyuhā lladhīna āmanū li-yastaʾdhinkumu lladhīna malakat aymānukum wa-lladhīna lam yablughū l-ḥuluma minkum thalātha marrātin min qabli ṣalawti l-fajri wa-ḥīna taḍaʿūna thiyābakum mina l-ẓahīrati wa-min baʿdi ṣalawti l-ʿishāi thalāthu ʿawrātin la-kum laysa ʿalaykum wa-lā ʿalayhim junāḥun baʿdahunna ṭawwāfūna ʿalaykum baʿḍukum ʿalā baʿḍin ka-dhālika yubayyinu allāhu lakumu l-ayāti wallāhu ʿalīmun ḥakīmun

O ye who believe! let those whom your right hands possess, and the (children) among you who have not come of age ask your permission (before they come to your presence), on three occasions: before morning prayer; the while ye doff your clothes for the noonday heat; and after the late-night prayer: these are your three times of undress: outside those times it is not wrong for you or for them to move about attending to each other: Thus does Allah make clear the Signs to you: for Allah is full of knowledge and wisdom.

Sura al-Nūr 24:60

وَٱلْقَوَٰعِدُ مِنَ ٱلنِّسَآءِ ٱلَّٰتِى لَا يَرْجُونَ نِكَاحًا فَلَيْسَ عَلَيْهِنَّ جُنَاحٌ أَن يَضَعْنَ ثِيَابَهُنَّ غَيْرَ مُتَبَرِّجَٰتٍۭ بِزِينَةٍ وَأَن يَسْتَعْفِفْنَ خَيْرٌ لَّهُنَّ وَٱللَّـهُ سَمِيعٌ عَلِيمٌ

wa-l-qawāʿidu mina l-nisāʾi allātī lā yarjūna nikāḥan fa-laysa ʿalayhinna junāḥun an yaḍaʿna thiyābahunna ghayra mutabarrijātin bizīnatin wa-an yastaʿfifna khayrun lahunna wallāhu samīʿun ʿalīmun

Such elderly women as are past the prospect of marriage,- there is no blame on them if they lay aside their (outer) garments, provided they make not a wanton display of their beauty: but it is best for them to be modest: and Allah is One Who sees and knows all things.