Sahih Muslim 3482
صحيح مسلم#3482SahihNarrated 'A'isha :'A'isha (Allah be pleased with her) reported that Allah's Apostle (ﷺ) married her when she was six years old, and he (the Holy Prophet) took her to his house when she was nine, and when he (the Holy Prophet) died she was eighteen years old
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 16:84