Musnad Ahmad 1153:2091

Uthman ibn Umar narrated to us, Yunus narrated to us, from al-Zuhri, from Urwah, from Aisha, that women from the believing women used to attend the morning prayer with the Messenger of Allah, peace and blessings of Allah be upon him. Then they would return to their houses wrapped in their sheets, not being recognized due to the darkness.