Narrated Abu Hurairah: The Prophet ﷺ said: If anyone corrupts (instigates) the wife of a man or his slave (against him), he is not from us.

Anas bin Malik said: A man peeped into some of the apartment of the prophet ﷺ. The prophet ﷺ got up taking an arrowhead or arrowheads. He said: I can still picture myself looking at the Messenger of Allah ﷺ when he was exploring to pierce him.

Narrated Abu Hurairah: The Prophet ﷺ said: If anyone peeps into the house of a people without their permission and he knocks out his eye, no responsibility is incurred for his eye.

Narrated Abu Hurairah: The Prophet ﷺ said: When one has a look into the house, then there is no (need of) permission.

Narrated Huzayl: A man came. Uthman's version has: Saad ibn Abu Waqqas came. He stood at the door. Uthman's version has: (He stood) facing the door. The Prophet ﷺ said to him: Away from it, (stand) this side or that side. Asking permission is meant to escape from the look of an eye.

A similar tradition has also been transmitted by Talhah bin Musarrif from a man from Saad from the prophet ﷺ through a different chain of narrators.

Narrated Kaladah ibn Hanbal: Safwan ibn Umayyah sent him with some milk, a young gazelle and some small cucumbers to the Messenger of Allah ﷺ when he was in the upper part of Makkah. I entered but I did not give a salutation. He said: Go back and say: "Peace be upon you"! This happened after Safwan ibn Umayyah and embraced Islam. Amr said: Ibn Safwan told me all this on the authority of Kaladah ibn Hanbal, and he did not say: I heard it from him. Abu Dawud said: Yahya bin Habib said: Umayyah bin Safwan. He did not say: I heard from Kaladah bin Hanbal. Yahya also said: Amr bin Abdullah bin Safwan told him that Kaladah bin al-Hanbal told him.

Narrated Ribi: A man of Banu Amir told that he asked the Prophet ﷺ for permission (to enter the house) when he was in the house, saying: May I enter ? The Prophet ﷺ said to his servant: Go out to this (man) and teach him how to ask permission to enter the house, and say to him: "Say: Peace be upon you. May I enter?" The man heard it and said: Peace be upon you! May I enter ? The Prophet ﷺ permitted him and he entered.

Ribi bin Hirash said I was told that a man of Banu Amir asked the prophet ﷺ for permission to enter the house. He then mentioned the rest of the tradition to the same effect. Abu Dawud said: Similarly, Musaddad transmitted it to us saying that Abu 'Awanah related it to us from Mansur. He did not say: "a man of Banu Amir".

Ribi said that a man of Banu Amir told him that he asked permission of the prophet ﷺ to enter the house. He related the tradition to the same effect, saying: I heard it and so I said: Peace be upon you. May I enter?