Sayyidah Umm Afif al-Nahdiyyah (may Allah be pleased with her) said: We gave our pledge of allegiance to the Messenger of Allah (peace and blessings be upon him) when he took the pledge from the women. He took a covenant from them that they would not speak with any man except a mahram, and he ordered us to recite Surah al-Fatihah over our deceased.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21872