Sahih al-Bukhari 7415
صحيح البخاري#7415SahihNarrated `Abdullah:A man from the people of the scripture came to the Prophet (ﷺ) and said, "O Abal-Qasim! Allah will hold the Heavens upon a Finger, and the Earth on a Finger and the land on a Finger, and all the creation on a Finger, and will say, 'I am the King! I am the King!' " I saw the Prophet (after hearing that), smiling till his premolar teeth became visible, and he then recited: -- 'No just estimate have they made of Allah such as due to him
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: 97:43