Sahih Muslim
The Book Pertaining to the Excellent Qualities of the Holy Prophet (may Peace be upon them) and His Companions (Kitab Al-Fadail)
Book Number: 030 / Hadith Number: 5813
Abu Musa Ash'ari reported that Allah's Messenger (may peace be upon him) mentioned many names of his and said: I am Muhammad, Ahmad. Muqaffi (the last in succession), Hashir, the Prophet of repentance, and the Prophet of Mercy.