Sahih Muslim | Book 25 | Hadith Number 5363
Narrated by Jabir b. Abdullah
Jabir b. Abdullah reported: I came to Allah's Apostle (may peace be upon him) and called him (with a view to seeking permission), whereupon Allah's Apostle (may peace be upon him) said: Who is it? I said: It is I. Thereupon he (the Holy Prophet) came out saying: It is I, it is I.