Sahih al-Bukhari 3030
Book 56: Fighting for the Cause of Allah (Jihaad) · Narrated by Jabir bin `Abdullah
Arabic
حَدَّثَنَا صَدَقَةُ بْنُ الْفَضْلِ، أَخْبَرَنَا ابْنُ عُيَيْنَةَ، عَنْ عَمْرٍو، سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ ـ رضى الله عنهما ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " الْحَرْبُ خُدْعَةٌ ".
English translation
Narrated Jabir bin `Abdullah:The Prophet (ﷺ) said, "War is deceit
Reference: Sahih al-Bukhari 3030, Book of Fighting for the Cause of Allah (Jihaad). English translation by Dr. Muhammad Muhsin Khan.