Virtues and Merits of the Prophet (pbuh) and his Companions

Bukhari :: Book 4 :: Volume 56 :: Hadith 816

Narrated Jabir bin Samura:

The Prophet said, "When Khosrau perishes, there will be no more Khosrau a after him, and when Caesar perishes, there will be no more Caesar after him," The Prophet also said, "You will spend the treasures of both of them in Allah's Cause."