Sahih al-Bukhari 7262
صحيح البخاري#7262SahihNarrated Abu Musa:The Prophet (ﷺ) entered a garden and told me to guard its gate. Then a man came and asked permission to enter. The Prophet, said, "Permit him and give him the good news that he will enter Paradise." Behold! It was Abu Bakr. Then `Umar came, and the Prophet (ﷺ) said, "Admit him and give him the good news that he will enter Paradise." Then `Uthman came and the Prophet (ﷺ) said, "Admit him and give him the good news that he will enter Paradise
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: 95:16