Al Ahzab Ayah 53

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا تَدْخُلُواْ بُيُوتَ ٱلنَّبِىِّ إِلَّآ أَن يُؤْذَنَ لَكُمْ إِلَىٰ طَعَامٍ غَيْرَ نَـٰظِرِينَ إِنَـٰهُ وَلَـٰكِنْ إِذَا دُعِيتُمْ فَٱدْخُلُواْ فَإِذَا طَعِمْتُمْ فَٱنتَشِرُواْ وَلَا مُسْتَــْٔنِسِينَ لِحَدِيثٍۚ إِنَّ ذَٲلِكُمْ كَانَ يُؤْذِى ٱلنَّبِىَّ فَيَسْتَحْىِۦ مِنكُمْۖ وَٱللَّهُ لَا يَسْتَحْىِۦ مِنَ ٱلْحَقِّۚ وَإِذَا سَأَلْتُمُوهُنَّ مَتَـٰعًا فَسْــَٔلُوهُنَّ مِن وَرَآءِ حِجَابٍۚ ذَٲلِكُمْ أَطْهَرُ لِقُلُوبِكُمْ وَقُلُوبِهِنَّۚ وَمَا كَانَ لَكُمْ أَن تُؤْذُواْ رَسُولَ ٱللَّهِ وَلَآ أَن تَنكِحُوٓاْ أَزْوَٲجَهُۥ مِنۢ بَعْدِهِۦٓ أَبَدًاۚ إِنَّ ذَٲلِكُمْ كَانَ عِندَ ٱللَّهِ عَظِيمًا ٥٣ O believers! Do not enter the homes of the Prophet without permission ?and if invited? for a meal, do not ?come too early and? linger until the meal is ready. But if you are invited, then enter ?on time?. Once you have eaten, then go on your way, and do not stay for casual talk. Such behaviour is truly annoying to the Prophet, yet he is too shy to ask you to leave. But Allah is never shy of the truth. And when you ?believers? ask his wives for something, ask them from behind a barrier. This is purer for your hearts and theirs. And it is not right for you to annoy the Messenger of Allah, nor ever marry his wives after him. This would certainly be a major offence in the sight of Allah.