Victory conditions for believers and failure for deniers

O you who believe, if you help (in the cause of) God He will surely come to your aid, and firmly plant your feet.

As for the unbelievers, they will suffer misfortunes, and their deeds will be rendered ineffective.

That is so as they were averse to what has been revealed by God, and their actions will be nullified.

Have they not journeyed in the land and seen the fate of those before them? Destroyed they were utterly by God; and a similar (fate) awaits the unbelievers.

This is so for God is the friend of those who believe while the unbelievers have no friend.