The Messenger of Allah ﷺ married her when she was nine years old, and he passed away when she was eighteen.
حدثنا أبو معاوية قال حدثنا الأعمش عن إبراهيم عن الأسود
تزوجها رسول الله ﷺ وهي بنت تسع سنين ومات عنها وهي بنت ثمان عشرة
Its isnad is sahih. We have already discussed the beginning of her narration and commented on it. See Bukhari 7/223 no. 3894, in the chapters on the virtues of the Ansar. Also Muslim 2/1038 no. 1422, Abu Dawud 2/239 no. 2121, and Nasai 6/82 no. 3258, all in the chapters on marriage.