Surah 33

Surah 33:53

"You who believe! Do not enter the houses of the prophet to (attend) a meal without waiting (until it) is ready, unless permission is given to you. But when you are invited, enter, and when you have eaten, disperse, and do not linger for conversation. Surely that is hurtful to the prophet, and he is ashamed of you, but God is not ashamed of the truth. When you ask them for anything, ask them from behind a veil. That is purer for your hearts and their hearts. It is not for you to hurt the messenger of God, nor to marry his wives after him – ever. Surely that is a great (offense) in the sight of God."