Musannaf Ibn Abi Shayba 3:857

Ibn Idris narrated to us, from Muhammad ibn ‘Amr, from al-Zuhri, from ‘Urwah, from ‘Aishah, who said: The Messenger of Allah (ﷺ) used to pray the dawn prayer, then the believing women would depart, wrapped in their garments, not being recognized due to the darkness.