Their doubts about the Quran and the response to them

Yet the unbelievers say: "This is nothing but a lie he has concocted in which others have aided him." They have come down to mischief and lies.

And they say: "These are fables of antiquity he has invented, which are dictated to him morning and evening."

Say: "He who knows the secrets of the heavens and the earth has revealed it to me; and He is surely forgiving and kind."