Musnad Ahmad 788:41

Waki’ narrated to us, from al-Mas’udi, and Yazid said: 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 which we memorized. He said: "I am Muhammad, and Ahmad, and al-Muqaffi (the Successor), and al-Hashir (the Gatherer), and the Prophet of Mercy." Yazid said: "And the Prophet of Repentance, and the Prophet of the Epic Battle."