Musannaf Ibn Abi Shayba 9:1435

Abu Bakr narrated to us, he said: Abu Mu'awiyah narrated to us, from al-A'mash, from Ibrahim, from al-Aswad, from Aisha, that the Prophet (peace and blessings of Allah be upon him) consummated the marriage with her when she was nine years old, and he died while she was eighteen years old.