(3) باب كَيْفَ كَانَتْ يَمِينُ النَّبِيِّ صلى الله عليه وسلم
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "If Khosrau is ruined, there will be no Khosrau after him; and if Caesar is ruined, there will be no Caesar after him. By Him in Whose Hand Muhammad's soul is, surely you will spend their treasures in Allah's Cause."
Reference: Sahih al-Bukhari 6630
In-book reference: Book 83, Hadith 10
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 78, Hadith 626