Narrated Jabir bin Samura: Allah's Apostle said, "When Khosrau is ruined, there will be no Khosrau after him; and when Caesar is ruined, their will be no Caesar after him. By Him in Whose Hands my life is, you will spend their treasures in Allah's Cause."
— Sahih Bukhari, Volume 4, Book 53: One-fifth of Booty to the Cause of Allah (Khumus), Hadith #350