Musannaf Ibn Abi Shayba 27:55

Al-Fadl ibn Dukayn narrated to us, from al-Mas'udi, from 'Amr ibn Murrah, from Abu 'Ubaydah, from Abu Musa, who said: The Messenger of Allah (may Allah bless him and grant him peace) named names for himself to us, some of which we memorized. He said: "I am Muhammad, and I am Ahmad, and al-Muqaffa (the Successor), and al-Hashir (the Gatherer), and the Prophet of Repentance, and the Prophet of the Great Battle."