It was narrated from 'Aishah that the Messenger of Allah married her when she was nine and he died when she was eighteen years old. (Using translation from Nasāʾī 3258)
عَنْ عَائِشَةَ «تَزَوَّجَهَا رَسُولُ اللهِ ﷺ وَهِيَ بِنْتُ تِسْعٍ وَمَاتَ عَنْهَا وَهِيَ بِنْتُ ثَمَانِيَ عَشْرَةَ»