Those who believe fight in the way of Allah, and those who disbelieve fight in the way of the Shaitan. Fight therefore against the friends of the Shaitan; surely the strategy of the Shaitan is weak.

And he went into the city at a time of unvigilance on the part of its people, so he found therein two men fighting, one being of his party and the other of his foes, and he who was of his party cried out to him for help against him who was of his enemies, so Musa struck him with his fist and killed him. He said: This is on account of the Shaitan's doing; surely he is an enemy, openly leading astray.