Sayyidah Umm Salma (may Allah be pleased with her) says: When Sayyidah Fatimah (may Allah be pleased with her), the daughter of the Prophet (peace and blessings be upon him), fell into the illness in which she passed away, I was nursing her. One day I saw her in good condition; since she had fallen ill I had not seen her in such a condition. That lady says: Sayyiduna Ali (may Allah be pleased with him) had gone out for some task. Sayyidah Fatimah (may Allah be pleased with her) said: Prepare water for a bath for me. I prepared water for her bath, and she bathed thoroughly. Then she said: Give me my new clothes. She was given the new clothes, and Sayyidah Fatimah (may Allah be pleased with her) put them on. Then she said: Spread my bed for me in the middle of the house. I did so, and she lay down. She faced the qiblah, placed her hand under her cheek, and then said: Now my death is approaching; I have purified myself, so let no woman uncover me now. Then she passed away in that very place. That lady says: When Sayyiduna Ali (may Allah be pleased with him) came, I informed him of this.
Imam Ahmad recorded this narration, and its chain contains a narrator whom I do not know.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15220