It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she said: the Messenger of Allah (peace and blessings be upon him) married me when I was seven years old, the marriage was consummated when I was nine years old, and he (peace and blessings be upon him) passed away when I was eighteen years old.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19350