Al-Ahzab 33:53

Ya ayyuha allatheena amanoola tadkhuloo buyoota annabiyyi illa an yu/thanalakum ila taAAamin ghayra nathireenainahu walakin itha duAAeetum fadkhuloofa-itha taAAimtum fantashiroo walamusta/niseena lihadeethin inna thalikum kanayu/thee annabiyya fayastahyee minkum wallahula yastahyee mina alhaqqi wa-ithasaaltumoohunna mataAAan fas-aloohunna min wara-ihijabin thalikum atharu liquloobikumwaquloobihinna wama kana lakum an tu/thoorasoola Allahi wala an tankihoo azwajahumin baAAdihi abadan inna thalikum kana AAinda AllahiAAatheema

O you who have believed, do not enter the houses of the Prophet except when you are permitted for a meal, without awaiting its readiness. But when you are invited, then enter; and when you have eaten, disperse without seeking to remain for conversation. Indeed, that [behavior] was troubling the Prophet, and he is shy of [dismissing] you. But Allāh is not shy of the truth. And when you ask [his wives] for something, ask them from behind a partition. That is purer for your hearts and their hearts. And it is not [conceivable or lawful] for you to harm the Messenger of Allāh or to marry his wives after him, ever. Indeed, that would be in the sight of Allāh an enormity.

O you who believe, do not enter the houses of the Prophet, unless you are permitted for a meal, not (so early as) to wait for its preparation. But when you are invited, go inside. Then, once you have had the meal, just disperse, and (do) not (sit for long) being keen for a chat. This (conduct of yours) hurts the Prophet, but he feels shy of (telling) you (about it), but Allah is not shy of the truth. And when you ask any thing from them (the blessed wives of the Prophet), ask them from behind a curtain. That is better for the purity of your hearts and their hearts. It is not allowed for you that you hurt Allah’s Messenger, nor that you ever marry his wives after him. Indeed, it would be an enormity in the sight of Allah.