Hafsa bint Sirin says: We used to prevent our young women from going out. A woman came, stayed at the palace of Banu Khalaf, and narrated that her sister was the wife of a companion, and that companion had participated in twelve battles with the Messenger of Allah, peace and blessings be upon him. My sister said: I also participated in six battles with the Prophet, peace and blessings be upon him. We used to treat the wounded and take care of the sick. My sister asked the Messenger of Allah, peace and blessings be upon him: Is there any harm if a woman who does not have a shawl does not go out for Eid? The Prophet, peace and blessings be upon him, said: Her friend should give her a shawl, and she should participate in goodness and the supplications of the Muslims. Then, when Sayyida Umm Atiyyah, may Allah be pleased with her, came, we asked her whether she had heard the Messenger of Allah, peace and blessings be upon him, say such and such. She said: Yes. Whenever she mentioned the Prophet, peace and blessings be upon him, she would say "Biban." Therefore, she said: "Biban." The Prophet, peace and blessings be upon him, said: Young women and those in seclusion, even menstruating women, should go out and participate in goodness and the supplications of the Muslims, but menstruating women should stay away from the prayer place. I said to Sayyida Umm Atiyyah: Even menstruating women? She said: Does not a menstruating woman go to Arafah and such and such places during Hajj?