What did the Prophet Muhammad (saw) say about the fate of Khosrau and Caesar?
 Narrated Abu Huraira:                     Allah's Apostle said, "If Khosrau is ruined, there will be no Khosrau after him; and if Caesar is ruined, there will be no Caesar after him. By Him in Whose Hand Muhammad's soul is, surely you will spend their treasures in Allah's Cause."