"It is not for the people of the city, and those of the Arabs who (dwell) around them, to lag behind the messenger of God, nor should they prefer their lives to his. That is because no thirst and no weariness and no emptiness smites them in the way of God, nor do they make any attack (that) enrages the disbelievers, nor do they take any gain from an enemy, except that a righteous deed is thereby written down for them. Surely God does not let the reward of the doers of good go to waste."