33/Al-Ahzab-51: You may put off whom you please of them, and you may take to you whom you please. And there is no blame for you whom you desire of those (again) that you had released. This is most proper, so that their eyes may be cool (that they are happy), and they may not grieve, and they should be pleased, all of them, with what you have given them. And Allah knows what is in your hearts and Allah is Ever All-Knowing, Most Gentle.
33/Al-Ahzab-52: After this, it is not lawful for you to change (with another woman) one of the (other) women or your wives even though their beauty pleases you, except those (concubines) whom your right hand possesses. And Allah is Watcher over all things.
33/Al-Ahzab-53: O you who believe (who wish to reach Allah while they are living)! Do not enter the Prophet’s houses unless permission is given to you! (If you have entered them) do not wait (taking your time) for a meal to be prepared. But enter when you are invited. When you have eaten your food, disperse immediately and do not linger for conversation, nor keep with your conversation (talk without permission). Surely this was causing annoyance to the Prophet but he was feeling shy of you. Allah is not shy of (telling you) the truth. When you ask of them (the wives of the Prophet) anything, ask of them from behind a curtain. This is purer for your and their hearts. It cannot be (lawful) for you that you to annoy the Messenger of Allah and after this for you to marry his wives forever. Surely this is an enormous sin in the Sight of Allah.
33/Al-Ahzab-54: Whether you divulge a thing or keep it hidden, surely Allah is Ever All-Knowing of all things.
