a Bedouin came to the door of the prophet and put his eye to the crack. The Prophet saw him and intended to put his eye out with a sword or a stick. When he saw him , he stopped, and the Prophet said to hi: "If you had persisted, I would have put your eye out."
Sunan an-Nasa'i Book 45, Hadith 153
← Previous Hadith "The letter which the Messenger of Allah wrote to 'Amr bin Hazm concerning blood money: 'For a soul, one hundred camels; for the nose if it is cut off completely, one hundred camels, for a blow to thread that reaches the brain, one third of the Diyah for a soul; for a stab wound that penetrates deeply, likewise; for a hand fifty; for an eye, fifty, for a foot, fifty; for every fingers, Ten camels for a tooth, five; and for a wound that exposes the bone, five.

Sunan an-Nasa'i Book 45, Hadith 152 Next 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