Musannaf Ibn Abi Shayba 34:259

Ibn Numayr narrated to us, from Zakariya, from Firas, from Amir, from Masruq, from Aisha, from Fatima, that the Prophet, peace and blessings of Allah be upon him, said to her: "You are the first of my household to join me, and what an excellent predecessor I am for you."