It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) was sitting in his house when a man came and began to look inside through a hole. The Prophet (peace and blessings be upon him) straightened the comb he was holding in his hand, so the man withdrew his head.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12829