Sahih al-Bukhari 6511
صحيح البخاري#6511SahihNarrated `Aisha:Some rough bedouins used to visit the Prophet (ﷺ) and ask him, "When will the Hour be?" He would look at the youngest of all of them and say, "If this should live till he is very old, your Hour (the death of the people addressed) will take place." Hisham said that he meant (by the Hour), their death
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 81:100