Sahih Muslim Book 30, Hadith Number 5694.

Chapter : The cistern of our Apostle (may peace be upon him) and its characteristics.

Haritha reported that he heard Allah’s Messenger (may peace be upon him) as saying: His Cistern would be as extensive as the distance between San’a’ and Medina. Mustaurid (one of the narrators) said: Did you not hear anything about the utensils? Thereupon he said. No. Mustaurid said: You would find that the utensils would be like stars.