And there are among them such as [seem to] listen to thee [O Prophet]: but over their hearts We have laid veils which prevent them from grasping the truth, and into their ears, deafness. And were they to see every sign [of the truth], they would still not believe in it-so much so that when they come unto thee to contend with thee, those who are bent on denying the truth say, "This is nothing but fables of ancient times!"