Sura al-Nūr 24:27

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَدْخُلُوا۟ بُيُوتًا غَيْرَ بُيُوتِكُمْ حَتَّىٰ تَسْتَأْنِسُوا۟ وَتُسَلِّمُوا۟ عَلَىٰٓ أَهْلِهَا ذَٰلِكُمْ خَيْرٌ لَّكُمْ لَعَلَّكُمْ تَذَكَّرُونَ

yā-ayyuhā lladhīna āmanū lā tadkhulū buyūtan ghayra buyūtikum ḥattā tastaʾnisū wa-tusallimū ʿala ahlihā dhālikum khayrun la-kum la-ʿallakum tadhakkarūna

O ye who believe! enter not houses other than your own, until ye have asked permission and saluted those in them: that is best for you, in order that ye may heed (what is seemly).

Sura al-Nūr 24:61

لَّيْسَ عَلَى ٱلْأَعْمَىٰ حَرَجٌ وَلَا عَلَى ٱلْأَعْرَجِ حَرَجٌ وَلَا عَلَى ٱلْمَرِيضِ حَرَجٌ وَلَا عَلَىٰٓ أَنفُسِكُمْ أَن تَأْكُلُوا۟ مِنۢ بُيُوتِكُمْ أَوْ بُيُوتِ ءَابَآئِكُمْ أَوْ بُيُوتِ أُمَّهَٰتِكُمْ أَوْ بُيُوتِ إِخْوَٰنِكُمْ أَوْ بُيُوتِ أَخَوَٰتِكُمْ أَوْ بُيُوتِ أَعْمَٰمِكُمْ أَوْ بُيُوتِ عَمَّٰتِكُمْ أَوْ بُيُوتِ أَخْوَٰلِكُمْ أَوْ بُيُوتِ خَٰلَٰتِكُمْ أَوْ مَا مَلَكْتُم مَّفَاتِحَهُۥٓ أَوْ صَدِيقِكُمْ لَيْسَ عَلَيْكُمْ جُنَاحٌ أَن تَأْكُلُوا۟ جَمِيعًا أَوْ أَشْتَاتًا فَإِذَا دَخَلْتُم بُيُوتًا فَسَلِّمُوا۟ عَلَىٰٓ أَنفُسِكُمْ تَحِيَّةً مِّنْ عِندِ ٱللَّـهِ مُبَٰرَكَةً طَيِّبَةً كَذَٰلِكَ يُبَيِّنُ ٱللَّـهُ لَكُمُ ٱلْأَيَٰتِ لَعَلَّكُمْ تَعْقِلُونَ

laysa ʿalā l-aʿmā ḥarajun wa-lā ʿalā l-aʿraji ḥarajun wa-lā ʿalā l-marīḍi ḥarajun wa-lā ʿala anfusikum an taʾkulū min buyūtikum aw buyūti ābāʾikum aw buyūti ummahātikum aw buyūti ikhwānikum aw buyūti akhawātikum aw buyūti aʿmāmikum aw buyūti ʿammātikum aw buyūti akhwālikum aw buyūti khālātikum aw mā malaktum mafātiḥahu aw ṣadīqikum laysa ʿalaykum junāḥun an taʾkulū jamīʿan aw ashtātan fa-idhā dakhaltum buyūtan fasallimū ʿala anfusikum taḥiyyatan min ʿindi allāhi mubārakatan ṭayyibatan ka-dhālika yubayyinu allāhu lakumu l-ayāti la-ʿallakum taʿqilūna

It is no fault in the blind nor in one born lame, nor in one afflicted with illness, nor in yourselves, that ye should eat in your own houses, or those of your fathers, or your mothers, or your brothers, or your sisters, or your father's brothers or your father's sisters, or your mohter's brothers, or your mother's sisters, or in houses of which the keys are in your possession, or in the house of a sincere friend of yours: there is no blame on you, whether ye eat in company or separately. But if ye enter houses, salute each other - a greeting of blessing and purity as from Allah. Thus does Allah make clear the signs to you: that ye may understand.