17. Isra · verses 88–89

قُل لَّئِنِ ٱجۡتَمَعَتِ ٱلۡإِنسُ وَٱلۡجِنُّ عَلَىٰٓ أَن يَأۡتُواْ بِمِثۡلِ هَٰذَا ٱلۡقُرۡءَانِ لَا يَأۡتُونَ بِمِثۡلِهِۦ وَلَوۡ كَانَ بَعۡضُهُمۡ لِبَعۡضٖ ظَهِيرٗا

Qul laini ijtamaAAati alinsu waaljinnu AAala an yatoo bimithli hatha alqurani la yatoona bimithlihi walaw kana baAAduhum libaAAdin thaheeran

Say: "If the whole of mankind and Jinns were to gather together to produce the like of this Qur´an, they could not produce the like thereof, even if they backed up each other with help and support.

وَلَقَدۡ صَرَّفۡنَا لِلنَّاسِ فِي هَٰذَا ٱلۡقُرۡءَانِ مِن كُلِّ مَثَلٖ فَأَبَىٰٓ أَكۡثَرُ ٱلنَّاسِ إِلَّا كُفُورٗا

Walaqad sarrafna lilnnasi fee hatha alqurani min kulli mathalin faaba aktharu alnnasi illa kufooran

And We have explained to man, in this Qur´an, every kind of similitude: yet the greater part of men refuse (to receive it) except with ingratitude!