Musnad Ahmad 1153:480

Abu al-Jawwab narrated to us, he said: Ammar ibn Ruzayq narrated to us, from Sulayman al-A'mash, from Ibrahim, from al-Aswad, from Aisha, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) set out by night from al-Batha on the night of the departure (nafr), a night journey."