Quran

 33:53

يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَدْخُلُوا بُيُوتَ النَّبِيِّ إِلَّا أَنْ يُؤْذَنَ لَكُمْ إِلَىٰ طَعَامٍ غَيْرَ نَاظِرِينَ إِنَاهُ وَلَٰكِنْ إِذَا دُعِيتُمْ فَادْخُلُوا فَإِذَا طَعِمْتُمْ فَانْتَشِرُوا وَلَا مُسْتَأْنِسِينَ لِحَدِيثٍ ۚ إِنَّ ذَٰلِكُمْ كَانَ يُؤْذِي النَّبِيَّ فَيَسْتَحْيِي مِنْكُمْ ۖ وَاللَّهُ لَا يَسْتَحْيِي مِنَ الْحَقِّ ۚ وَإِذَا سَأَلْتُمُوهُنَّ مَتَاعًا فَاسْأَلُوهُنَّ مِنْ وَرَاءِ حِجَابٍ ۚ ذَٰلِكُمْ أَطْهَرُ لِقُلُوبِكُمْ وَقُلُوبِهِنَّ ۚ وَمَا كَانَ لَكُمْ أَنْ تُؤْذُوا رَسُولَ اللَّهِ وَلَا أَنْ تَنْكِحُوا أَزْوَاجَهُ مِنْ بَعْدِهِ أَبَدًا ۚ إِنَّ ذَٰلِكُمْ كَانَ عِنْدَ اللَّهِ عَظِيمًا ﴿٥٣﴾

53. O you who believe! Do not enter the Prophet's homes for a meal, unless you are invited, and do not wait for its preparation. But if you are invited, then enter. And when you have eaten, then disperse, without lingering for conversation. This irritates the Prophet, and he shies away from you, but Allah does not shy away from the truth. And when you ask his wives for something, ask them from behind a screen; that is purer for your hearts and their hearts. You must never offend Allah’s Messenger, nor marry his wives after him, ever, for that would be an enormity with Allah.