Oneness, Uniqueness of Allah (Tawheed)

Bukhari :: Book 9 :: Volume 93 :: Hadith 604

Narrated 'Abdullah:

A priest from the Jews came (to the Prophet) and said, "On the Day of Resurrection, Allah will place all the heavens on one finger, and the Earth on one finger, and the waters and the land on one finger, and all the creation on one finger, and then He will shake them and say. 'I am the King! I am the King!'" I saw the Prophet smiling till his premolar teeth became visible expressing his amazement and his belief in what he had said. Then the Prophet recited: 'No just estimate have they made of Allah such as due to Him (up to)...; High is He above the partners they attribute to Him.' (39.67)