Sahih Bukhari
Sahih Bukhari Volume 008, Book 074, Hadith Number 267.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 74. Asking Permission
Narated By Jabir : I came to the Prophet in order to consult him regarding my father's debt. When I knocked on the door, he asked, "Who is that?" I replied, "I" He said, "I, I?" He repeated it as if he disliked it.