(Etiquette)
O you who believe, do not enter the prophet’s homes unless you are given permission to eat, nor shall you force such an invitation in any manner. If you are invited, you may enter. When you finish eating, you shall leave; do not engage him in lengthy conversations. This used to hurt the prophet, and he was too shy to tell you. But God does not shy away from the truth. If you have to ask his wives for something, ask them from behind a barrier. This is purer for your hearts and their hearts. You are not to hurt the messenger of God. You shall not marry his wives after him, for this would be a gross offense in the sight of God.*
يٰأَيُّهَا الَّذينَ ءامَنوا لا تَدخُلوا بُيوتَ النَّبِىِّ إِلّا أَن يُؤذَنَ لَكُم إِلىٰ طَعامٍ غَيرَ نٰظِرينَ إِنىٰهُ وَلٰكِن إِذا دُعيتُم فَادخُلوا فَإِذا طَعِمتُم فَانتَشِروا وَلا مُستَـٔنِسينَ لِحَديثٍ إِنَّ ذٰلِكُم كانَ يُؤذِى النَّبِىَّ فَيَستَحى ۦ مِنكُم وَاللَّهُ لا يَستَحى ۦ مِنَ الحَقِّ وَإِذا سَأَلتُموهُنَّ مَتٰعًا فَسـَٔلوهُنَّ مِن وَراءِ حِجابٍ ذٰلِكُم أَطهَرُ لِقُلوبِكُم وَقُلوبِهِنَّ وَما كانَ لَكُم أَن تُؤذوا رَسولَ اللَّهِ وَلا أَن تَنكِحوا أَزوٰجَهُ مِن بَعدِهِ أَبَدًا إِنَّ ذٰلِكُم كانَ عِندَ اللَّهِ عَظيمًا
yaaa aiyuhal lazeena aamanoo laa tadkhuloo bu yootan Nabiyyi illaaa ai yu’zana lakum ilaa ta’aamin ghaira naazireena inaahu wa laakin izaa du’eetum fadkhuloo fa izaa ta’imtum fantashiroo wa laa mustaaniseena lihadees; inna zaalikum kaana yu’zin Nabiyya fa yastahyee minkum wallaahu laa yastahyee minal haqq; wa izaa sa altumoohunna mataa’an fas’aloohunna minw waraaa’i hijaab; zaalikum atharu liquloobikum wa quloobihinn; wa maa kaana lakum an tu’zoo Rasoolal laahi wa laaa an tankihooo azwaajahoo mim ba’diheee abadaa; inna zaalikum kaana ‘indal laahi ‘azeema
*33:53 We are enjoined in 4:22 from marrying women who were previously married to our fathers. Nor can the father marry the divorced wife of his genetic son (4:23). This divine commandment preserves our respect for our fathers and their most private affairs. Similarly, the prophet was a father figure to the believers of his time. For the good of those believers, God enjoined them from marrying women who were previously married to the prophet. Marriage is a sacred and very private relationship, and the prophet’s private life was better kept private.