The Prophet (ﷺ) 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 (ﷺ) also said, "You will spend the treasures of both of them in Allah's Cause."
Reference: Sahih al-Bukhari 3619 In-book : Book 61, Hadith 126 USC-MSA web (English) : Vol. 4, Book 56, Hadith 816 (deprecated)
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