Sahih Muslim
The Book Pertaining to the Turmoil and Portents of the Last Hour (Kitab Al-Fitan wa Ashrat As-Saah)
Book Number: 041 / Hadith Number: 6997
This hadith has transmitted on the authority of Abu Sa'id that Allah's Messenger (may peace be upon him) asked Ibn Sa'id about the earth of Paradise. Thereupon he said: Abu'l-Qasim, It is like a fine white musk, whereupon he (the Holy Prophet) said: 'You have told the the truth.