Musnad Abu Ya'la al-Mawsili 115:297

Ubayd Allah narrated to us, Abd al-Rahman narrated to us, from Imran al-Qattan, from Qatadah, from Anas, who said: The Messenger of Allah appointed Ibn Umm Maktum as his successor over Medina twice. He said: I saw him on the day of al-Qadisiyyah, and he had a black banner with him.