Sahih Bukhari
To make the Heart Tender (Ar-Riqaq)
Volume: 008 / Book Number: 076 / Hadith Number: 526
Narrated Abu Huraira:
The Prophet said, "Allah will take the whole earth (in His Hand) and will roll up the Heaven in His right Hand, and then He will say, "I am King! Where are the kings of the earth ? "