41:5
And they say, "Our hearts (are) in coverings from what you call us to it, and in our ears (is) deafness, and from between us and between you (is) a screen. So work, indeed, we (are) working."
41:44
And if We (had) made it a Quran (in) a foreign (language), they (would have) said, "Why not are explained in detail its verses? (Is it) a foreign (language) and an Arab?" Say, "It (is) for those who believe, a guidance and a healing." And those who (do) not believe, in their ears (is) deafness, and it (is) for them blindness. Those are being called from a place far."