Al-Ahzab 33:53 يا ايها الذين امنوا لا تدخلوا بيوت النبي الا ان يوذن لكم الى طعام غير ناظرين اناه ولاكن اذا دعيتم فادخلوا فاذا طعمتم فانتشروا ولا مستانسين لحديث ان ذالكم كان يوذي النبي فيستحيي منكم والله لا يستحيي من الحق واذا سالتموهن متاعا فاسالوهن من وراء حجاب ذالكم اطهر لقلوبكم وقلوبهن وما كان لكم ان توذوا رسول الله ولا ان تنكحوا ازواجه من بعده ابدا ان ذالكم كان عند الله عظيما ٥٣

O ye who believe! Enter not the Prophet's houses,- until leave is given you,- for a meal, (and then) not (so early as) to wait for its preparation: but when ye are invited, enter; and when ye have taken your meal, disperse, without seeking familiar talk. Such (behaviour) annoys the Prophet: he is ashamed to dismiss you, but Allah is not ashamed (to tell you) the truth. And when ye ask (his ladies) for anything ye want, ask them from before a screen: that makes for greater purity for your hearts and for theirs. Nor is it right for you that ye should annoy Allah's Messenger, or that ye should marry his widows after him at any time. Truly such a thing is in Allah's sight an enormity.