The Book on Government (Kitab Al-Imara)

Muslim :: Book 20 : Hadith 4597

It has been narrated on the authority of Ibn 'Abbas that the Messenger of Allah (may peace be upon him) said on the day of the Conquest of Mecca: There is no Hijra now, but (only) Jihad (fighting for the cause of Islam) and sincerity of purpose (have great reward) ; when you are asked to set out (on an expedition undertaken for the cause of Islam) you should (readily) do so.