(157) باب الْحَرْبُ خَدْعَةٌ
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Khosrau will be ruined, and there will be no Khosrau after him, and Caesar will surely be ruined and there will be no Caesar after him, and you will spend their treasures in Allah's Cause." He called, "War is deceit'.
Reference: Sahih al-Bukhari 3027, 3028
In-book reference: Book 56, Hadith 235
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 52, Hadith 267