What did the Prophet Muhammad (saw) say about Khosrau and Caesar?
 Narrated Abu Huraira:                     Allah's Apostle said, "When Khosrau is ruined, there will be no Khosrau after him; and when Caesar is ruined, there will be no Caesar after him. By Him in Whose Hands my life is, you will spend their treasures in Allah's Cause."