Sahih Muslim 7409
صحيح مسلم#7409SahihA'isha reported that when the desert Arabs came to Allah's Messenger (ﷺ) they asked about the Last Hour as to when that would come. And he looked towards the youngest amongst them and said:If he lives he would not grow very old that he would find your Last Hour coming to you (he would see you dying)
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: 54:170