And if We had revealed it unto any of the non-Arabs, and he had recited it unto them, they would not have believed in it.And Allah says:وَلَوْ فَتَحْنَا عَلَيْهِم بَاباً مِّنَ السَّمَاءِ فَظَلُّواْ فِيهِ يَعْرُجُونَلَقَالُواْ إِنَّمَا سُكِّرَتْ أَبْصَـرُنَاAnd even if We opened to them a gate from the heaven and they were to keep on ascending thereto. They would surely say:"Our eyes have been dazzled..." (15:14-15)وَلَوْ أَنَّنَا نَزَّلْنَأ إِلَيْهِمُ الْمَلَـيِكَةَ وَكَلَّمَهُمُ الْمَوْتَىAnd even if We had sent down unto them angels, and the dead had spoken unto them... (6:111)إِنَّ الَّذِينَ حَقَّتْ عَلَيْهِمْ كَلِمَةُ رَبِّكَ لَا يُوْمِنُونَTruly, those, against whom the Word of your Lord has been justified, will not believe. (10:96