For each (person), there are angels in succession, before and behind him. They guard him by the Command of Allah. Verily! Allah will not change the good condition of a people as long as they do not change their state of goodness themselves (by committing sins and by being ungrateful and disobedient to Allah). But when Allah wills a people's punishment, there can be no turning back of it, and they will find besides Him no protector.