Jihad (Kitab Al-Jihad) 
Dawud :: Book 14 : Hadith 2631
Narrated Ka'b ibn Malik:
When the Prophet (peace_be_upon_him) intended to go on an expedition, he always pretended to be going somewhere else, and he would say: War is deception.
Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2631
Narrated Ka'b ibn Malik:
When the Prophet (peace_be_upon_him) intended to go on an expedition, he always pretended to be going somewhere else, and he would say: War is deception.