Sunan Ibn Majah, Book 24, Hadith 2941 (In-Book) ⓘ
It was narrated from Ibn ‘Abbas that the Prophet said: “War is deceit.”
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا يُونُسُ بْنُ بُكَيْرٍ، عَنْ مَطَرِ بْنِ مَيْمُونٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " الْحَرْبُ خُدْعَةٌ " .
also referenced under: Hadith 2834 (Reference) & Volume 4, Book 24, Hadith 2834 (DarusSalam)