Musnad Abu Ya'la al-Mawsili 209:31

Ja'far ibn Muhammad al-Rasi narrated to us, Abu Salih narrated to us, al-Layth narrated to us, he said: Yunus narrated to me, from Ibn Shihab, he said: Hind bint al-Harith informed me, from Umm Salamah, she said: The women used to pray during the time of the Messenger of Allah, may Allah bless him and grant him peace. When the Prophet, may Allah bless him and grant him peace, would say the taslim, they would depart, while the Prophet, may Allah bless him and grant him peace, and those who prayed with him would remain for as long as Allah willed. Then he would stand.