Musnad Abu Ya'la al-Mawsili 149:60

Ishaq and a group said: Sufyan ibn 'Uyaynah narrated to us, from al-Zuhri, from 'Urwah, from 'Aishah: That women from the believing women used to pray the morning prayer with the Messenger of Allah, peace and blessings of Allah be upon him, while wrapped in their garments (murut). Then they would return to their families, and no one would recognize them.