Sahih Muslim 7327
صحيح مسلم#7327SahihAbu Huraira reported that Allah's Messenger (ﷺ) said:Kisra (Khusrau king of Persia) would die and Qaisar (Ceasar King of Rome) would die; there would be no Qaisar after him, but, by the One in Whose Hand is my life, you would spend their treasures in the cause of Allah. This hadith has been transmitted on the authority of Zuhri
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 54:92