Messenger of Allah ﷺ 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."
قَالَ رَسُولُ اللَّهِ ﷺ إِذَا هَلَكَ كِسْرَى فَلاَ كِسْرَى بَعْدَهُ وَإِذَا هَلَكَ قَيْصَرُ فَلاَ قَيْصَرَ بَعْدَهُ وَالَّذِي نَفْسِي بِيَدِهِ لَتُنْفَقَنَّ كُنُوزُهُمَا فِي سَبِيلِ اللَّهِ