Allah said: Surely I will send it down to you, but whoever shall disbelieve afterwards from among you, surely I will chastise him with a chastisement with which I will not chastise, anyone among the nations.

Has not the account reached you of those before you, of the people of Nuh and Ad and Samood, and those after them? None knows them but Allah. Their messengers come to them with clear arguments, but they thrust their hands into their mouths and said: Surely we deny that with which you are sent, and most surely we are in serious doubt as to that to which you invite us.