‏الجهاد والسير‏ : Hadeeth No:4311 It is narrated on the authority of Jabir that the Messenger of Allaah (sallAllaahu alayhi wa sallam) said: War is a stratagem....

‏الفضائل : Hadeeth No:5699 A hadith like this has been narrated on the authority of Ibn Umar through another chain of transmitters....