"Whoever looks into a house without the permission of the occupants and they put out his eye, he has no right to blood money or retaliation."
Sunan an-Nasa'i Book 45, Hadith 155
← Previous Hadith a man looked through a hole in the door of the Prophet, who had with him a kind of comb with which he was scratching his head, When the Messenger of Allah saw him he said: "If I had known that you were watching me, I would have stabbed you in the eye with this. This rule of asking permission has been ordained so that one may not look unlawfully (into people's houses).

Sunan an-Nasa'i Book 45, Hadith 154 Next Hadith → "If a person were to look at you without permission and you were to throw a stone at him and put out his eye, there would be no blame on you."

Sunan an-Nasa'i Book 45, Hadith 156