Surat Al Isra' (87-88)

{إِلاَّ رَحْمَةً مِّن رَّبِّكَ إِنَّ فَضْلَهُ كَانَ عَلَيْكَ كَبِيراً} (الإسراء: 87)

87- However, We do not will that out of Allah's Mercy with you and with people, and His Favor over you is great and His Blessings to all creatures by sending down the Qur'an and other favors.

{قُل لَّئِنِ اجْتَمَعَتِ الإِنسُ وَالْجِنُّ عَلَى أَن يَأْتُواْ بِمِثْلِ هَذَا الْقُرْآنِ لاَ يَأْتُونَ بِمِثْلِهِ وَلَوْ كَانَ بَعْضُهُمْ لِبَعْضٍ ظَهِيراً} (الإسراء: 88)

88- O Messenger, tell them: If humans and jinn had gathered and cooperated to bring something like the Qur'an, they could not have done so even if they exerted all their efforts, knowledge, creativity, talent and skills, for it is the words of Allah. No one would be able to bring something of the like or even 10 Ayahs or even three Ayahs, but if it was part of human speech, they would bring something of the like.