Sahih al-Bukhari 7451
صحيح البخاري#7451SahihNarrated `Abdullah:A Jewish Rabbi came to Allah's Messenger (ﷺ) and said, "O Muhammad! Allah will put the Heavens on one finger and the earth on one finger, and the trees and the rivers on one finger, and the rest of the creation on one finger, and then will say, pointing out with His Hand, 'I am the King.' "On that Allah's Apostle smiled and said, "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: 97:77