And We have not sent before you but men from (among) the people of the towns, to whom We sent revelations. Have they not then travelled in the land and seen what was the end of those before them? And certainly the abode of the hereafter is best for those who guard (against evil); do you not then understand?

Have they not travelled in the earth and seen how was the end of those who were before them? Mightier than these were they in strength-- and in fortifications in the land, but Allah destroyed them for their sins; and there was not for them any defender against Allah.

O you who believe! be careful of (your duty to) Allah, and let every soul consider what it has sent on for the morrow, and be careful of (your duty to) Allah; surely Allah is Aware of what you do.