17:88
قُلْ لَئِنِ اجْتَمَعَتِ الْاِنْسُ وَالْجِنُّ عَلٰٓى اَنْ یَاْتُوا بِمِثْلِ هٰذَا الْقُرْاٰنِ لَا یَاْتُونَ بِمِثْلِهٖ وَلَوْ كَانَ بَعْضُهُمْ لِبَعْضٍ ظَهٖیرًا
Qul laini ijtamaAAati alinsu waaljinnu AAala an yatoo bimithli hatha alqurani la yatoona bimithlihi walaw kana baAAduhum libaAAdin thaheeran
Translations
Say, "If mankind and the jinn gathered in order to produce the like of this Qur'an, they could not produce the like of it, even if they were to each other assistants
Saheeh International
Say: Verily, though mankind and the jinn should assemble to produce the like of this Qur'an, they could not produce the like thereof though they were helpers one of another
Marmaduke Pickthall