Musnad Ahmad 1166:17

Abdullah ibn al-Harith al-Makhzumi narrated to us, he said: al-Dahhak ibn Uthman narrated to me, from Ibrahim ibn Abdullah ibn Hunayn, from Abu Murrah, from Umm Hani, that she saw the Messenger of Allah (peace and blessings of Allah be upon him) praying in a single garment, having crossed its two ends over his shoulders, eight rak'ahs in Makkah, on the day of the Conquest.