Sahih al-Bukhari 4729
صحيح البخاري#4729SahihNarrated Abu Huraira:Allah's Messenger (ﷺ) said, "On the Day of Resurrection, a huge fat man will come who will not weigh, the weight of the wing of a mosquito in Allah's Sight." and then the Prophet (ﷺ) added, 'We shall not give them any weight 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: 65:251