Mukhtasar Bukhari (Abridged) 1297 — War is conducted with strategy

Narrated Abu Huraira (may Allah be pleased with him) from the Prophet (peace and blessings of Allah be upon him) that he said: "Kisra has perished, and there will be no Kisra after him, and Caesar will also perish, and there will be no Caesar after him, and surely you will distribute the treasures of Caesar and Kisra in the way of Allah."