Sahih al-Bukhari 238
صحيح البخاري#238SahihNarrated Abu Huraira:Allah's Messenger (ﷺ) said, "We (Muslims) are the last (people to come in the world) but (will be) the foremost (on the Day of Resurrection)
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: 4:104