Musnad Ahmad 788:137

'Amr ibn al-Haytham narrated to us, al-Mas'udi narrated to us, and Yazid ibn Harun narrated to us, al-Mas'udi informed us, 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 himself names for us. Some of them we memorized, and some of them we did not memorize. He said: "I am Muhammad, and I am Ahmad, and al-Muqaffi (the Successor), and al-Hashir (the Gatherer), and the Prophet of Repentance, and the Prophet of the Great Battle."