سورة Al-An'am ( The Cattle ) - الآية 25

And among them is one who listens to you; and We have put covers upon their hearts so they may not understand it, and deafness in their ears; and (even) if they see all the signs, they will not believe in them; to the extent that when they come to you to debate with you, the disbelievers say, “This is nothing but stories of former people.”