Sayyidina Sahi ibn Sa’d Saidi (RA) reported that a man peeped into the room of the Prophet (SAW) through on aperture He had a comb with which he was scratching his hair and he said, “If I had known that you were peeping inside then I would have poked your eyes with it. Seeking permission is initiated only because of Ihe eyes.’
[Ahmed 22866, Bukhari 6241, Muslim 2156, Nisai 4874]