Musannaf Ibn Abi Shayba 20:40

Abu Bakr narrated to us, he said: Hafs narrated to us, from Ja'far, from his father, that the Messenger of Allah (may Allah bless him and grant him peace) decreed the daughter of Hamza to Ja'far, and he said: "Indeed, her maternal aunt is with him, and the maternal aunt is like a mother."