You who believe! Do not enter houses other than your own until you have asked permission and greeted their inhabitants. That is better for you, so that hopefully you will pay heed. And if you find no one at home do not go in until permission has been granted you. And if you are told to go away then go away. That is purer for you. Allah knows what you do. There is nothing wrong in your entering houses where no one lives and where there is some service for you. Allah knows what you divulge and what you conceal. (Surat an-Nur, 27-29)
There is no objection to the blind, no objection to the lame, no objection to the sick nor to yourselves if you eat in your own houses or your fathers' houses or your mothers' houses or your brothers' houses or your sisters' houses or the houses of your paternal uncles or paternal aunts or the houses of your maternal uncles or maternal aunts or places to which you own the keys or those of your friends. There is nothing wrong in your eating together or eating separately. And when you enter houses greet one another with a greeting from Allah, blessed and good. In this way Allah makes the Signs clear to you so that hopefully you will use your intellect. (Surat an-Nur, 61)
The believers are those who believe in Allah and His Messenger and who, when they are with him on a matter of common concern, do not leave until they have asked him for permission. Those people who ask you for permission are the ones who truly believe in Allah and His Messenger. If they ask your permission to attend to their own affairs, give permission to any of them you please; and ask Allah's forgiveness for them. Allah is Ever-Forgiving, Most Merciful. (Surat an-Nur, 62)
Be moderate in your tread and lower your voice. The most hateful of voices is the donkey's bray.' (Surah Luqman, 19)
Wives of the Prophet! If you guard against evil and do not be too soft-spoken in your speech lest someone with sickness in his heart becomes desirous.Speak correct and courteous words. (Surat al-Ahzab, 32)
Remain in your houses and do not display your beauty as it was previously displayed in the Time of Ignorance. Perform prayer and pay the welfare tax and obey Allah and His Messenger. Allah desires to remove all impurity from you, People of the House, and to purify you completely. (Surat al-Ahzab, 33)
O Prophet! Tell your wives and daughters and the women of the believers to draw their outer garments closely round themselves. This makes it more likely that they will be recognised and not be harmed. Allah is Ever-Forgiving, Most Merciful. (Surat al-Ahzab, 59)
You who believe! Do not go into the Prophet's houses except when you are invited to come and eat. Do not wait there while the food is being cooked. However, when you are called, go in, and when you have eaten, disperse, not remaining there to chat with one another. Doing that causes annoyance to the Prophet though he is too reticent to tell you so. But Allah is not reticent with the truth. When you ask his wives for something, ask them from behind a screen. That is purer for your hearts and their hearts. It is not right for you to cause annoyance to the Messenger of Allah or ever to marry his wives after him. To do that would be a dreadful thing in Allah's sight. (Surat al-Ahzab, 53)
When they entered his dwelling and said, 'Peace!'he said, 'Peace, to people we do not know.' So he slipped off to his household and brought a fattened calf. (Surat adh-Dhariyat, 25-26)
You who believe! Do not raise your voices above the voice of the Prophet and do not be as loud when speaking to him as you are when speaking to one another, lest your actions should come to nothing without your realising it. Those who lower their voices when they are with the Messenger of Allah are people whose hearts Allah has tested for heedfulness. They will have forgiveness and an immense reward. As for those who call out to you from outside your private quarters, most of them do not use their intellect. (Surat al-Hujurat, 2-4)