Jami` at-Tirmidhi, Book 33, Hadith 59 (In-Book) ⓘ
Abu Hurairah narrated that the Messenger of Allah(s.a.w) said: "When Kisra is ruined, there will be no Kisra after him, and when Caesar is ruined, there will be no Caesar after him. By the One in Whose Hand is my soul! You shall spend their treasures in Allah's cause."
حَدَّثَنَا سَعِيدُ بْنُ عَبْدِ الرَّحْمَنِ، حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا هَلَكَ كِسْرَى فَلاَ كِسْرَى بَعْدَهُ وَإِذَا هَلَكَ قَيْصَرُ فَلاَ قَيْصَرَ بَعْدَهُ وَالَّذِي نَفْسِي بِيَدِهِ لَتُنْفَقَنَّ كُنُوزُهُمَا فِي سَبِيلِ اللَّهِ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
also referenced under: Hadith 2216 (Reference) & Volume 4, Book 31, Hadith 2216 (DarusSalam)