Do they not consider how many a generation We have destroyed before them, whom We had established in the earth as We have not established you, and We sent the clouds pouring rain on them in abundance, and We made the rivers to flow beneath them, then We destroyed them on account of their faults and raised up after them another generation.

And what reason have you that you should not spend in Allah's way? And Allah's is the inheritance of the heavens and the earth, not alike among you are those who spent before the victory and fought (and those who did not): they are more exalted in rank than those who spent and fought afterwards; and Allah has promised good to all; and Allah is Aware of what you do.