It is reported about Sayyiduna Ali (may Allah be pleased with him) that he was with the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) asked: What is the best thing for a woman? The people remained silent. Sayyiduna Ali (may Allah be pleased with him) says: When I went back home, I asked Fatimah: What is the best thing for women? Sayyidah Fatimah (may Allah be pleased with her) said: That men do not see them. Sayyiduna Ali (may Allah be pleased with him) says: Later I mentioned this to the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) said: Fatimah is a part of my very self.
Imam al-Bazzar recorded this narration, and its chain contains a narrator whom I do not know.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15200