The Messenger of Allah ﷺ said, "War is deception."
حدثنا سفيان قال سمع عمرو جابر بن عبد الله وقال مرة عمرو سمعه من
قال رسول الله ﷺ الحرب خدعة
No references are available.
Its isnad is sahih. It has preceded many times, narrated from Ali. See also 14111 and its cross-references.