Fighting is good for you

Have you not seen those who were told, ‘Restrain yourselves, establish prayer, and give charity’? But when fighting was ordained, some feared people as they should fear Allah, or even more. They said, ‘Our Lord, why have You commanded us to fight? If only You had delayed it for a while!’ Say, ‘The enjoyment of this world is brief, but the Hereafter is far better for the mindful. You will not be wronged even by the width of a thread.’

4:77Hast thou not seen those unto whom it was said: Withhold your hands, establish worship and pay the poordue, but when fighting was prescribed for them behold! a party of them fear mankind even as their fear of Allah or with greater fear, and say: Our Lord! Why hast Thou ordained fighting for us? If only Thou wouldst give us respite yet a while! Say (unto them, O Muhammad): The comfort of this world is scant; the Hereafter will be better for him who wardeth off (evil); and ye will not be wronged the down upon a date-stone.