What did the Prophet Muhammad (peace be upon him) advise when a man at Al-Baqi' addressed him by his Kunya (name)?
 Narrated Anas:                     A man at Al-Baqi' called, "O Abul-Qasim!" The Prophet turned to him and the man said (to the Prophet ), "I did not intend to call you." The prophet said, "Name yourselves by my name but not by my Kunya (name).