It is narrated from Sayyiduna Ali (may Allah be pleased with him), he says: Allah Almighty has called war by the name of deception on the tongue of His Prophet.
Hadith Referenceالفتح الربانی / كتاب الجهاد / 4940
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«حسن لغيره، أخرجه ابويعلي: 494، وابن ابي شيبة: 12/ 529 ، (انظر مسند أحمد ترقيم الرسالة: 696 ترقیم بيت الأفكار الدولية: 696»
Brief Explanation
Benefits: … Deception in battle is considered as such in the sense that something else is outwardly expressed, while the hidden matter is different. However, any deception by which a covenant or guarantee of safety is broken will be unlawful.