(Believers! it is your duty also that you) keep prepared to meet them with whatever you can afford of armed force and of mounted pickets at the frontier, to strike terror thereby into the hearts of the enemies of Allâh and your enemies and such others besides them that you do not know, (but) Allâh knows them. And whatever you spend in the cause of Allâh, it shall be repaid to you in full and you will not be dealt with unjustly.