Volume 8 · Book 74 · Hadith 267
Narrated 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.
— Sahih Bukhari, Volume 8, Book 74: Asking Permission, Hadith #267