And of them is he who hearkens to you, and We have cast veils over their hearts lest they understand it and a heaviness into their ears; and even if they see every sign they will not believe in it; so much so that when they come to you they only dispute with you; those who disbelieve say: This is naught but the stories of the ancients.

And certainly We sent messengers before you and gave them wives and children, and it is not in (the power of) an messenger to bring a sign except by Allah's permission; for every term there is an appointment.

And who is more unjust than he who is reminded of the communications of his Lord, then he turns away from them and forgets what his two hands have sent before? Surely We have placed veils over their hearts lest they should understand it and a heaviness in their ears; and if you call them to the guidance, they will not ever follow the right course in that case.

And if We had made it a Quran in a foreign tongue, they would certainly have said: Why have not its communications been made clear? What! a foreign (tongue) and an Arabian! Say: It is to those who believe a guidance and a healing; and (as for) those who do not believe, there is a heaviness in their ears and it is obscure to them; these shall be called to from a far-off place.