It is narrated from Sayyiduna Sahl bin Sa’d (may Allah be pleased with him) that a man looked into the house of the Prophet (peace and blessings of Allah be upon him) through a hole in the door, while the Prophet (peace and blessings of Allah be upon him) had a wooden comb in his hand with which he was scratching his head. When the Prophet (peace and blessings of Allah be upon him) saw him, he said: "If I had known that you were peeking at me from outside, I would have struck your eye with this comb."