Explained in Detail - 41:41
Those who disbelieve in the Message after it has reached them, let them know that it is a superior Book.
The Qur'an is a superior Book:
The Night Journey/17:88
"Say: "Even if all mankind and jinn gathered together to create the like of this Qur´an and supported each other in it, they could not create the like of it."
Prophet Hud/11:13
"Do they say: "He fabricated it (the Qur´an)"? Say: "Come on, bring ten suras like it, fabricated. And call all your friends besides Allah, if you are truthful!"
The Women/4:82
Do they not examine the Qur´an? Had it belonged to anyone other than Allah, they would have found many contradictions in it.
The Companies/39:23
Allah has sent down the best hadith in a coherent book in two parts. The skins of those who honor their Lord tremble because of it. Then their skins and hearts soften towards the message of Allah. This is Allah´s guidance; He guides whom He wills and/or guides whom He wills to it. There is no guidance for anyone whom Allah leads astray
The Heights/7:52
We have brought them a Book which We have detailed with knowledge, a guidance and mercy for a people who believe.
Prophet Hud/11:1
A.L.R. (This is) a Book whose verses have been made firm by One Wise and All-Knowing, and then explained and elaborated.
Prophet Hud/11:14
If they could not answer you, know that it has been sent down with the knowledge of Allah and there is no god but Him. Will you then become Muslims?
The Poets/26:209
This is a warning and a message; for We do not wrong.
The Poets/26:210
It has not been sent down by the devils.
The Poets/26:211
They are neither able nor capable of it.