GodlyVerses

[23]And if you are in doubt about what We have sent down upon Our Servant [Muhammad], then produce a surah the like thereof and call upon your witnesses other than Allah, if you should be truthful.
[24]But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers. - Quran Al-Baqarah(The Cow) 2:23-24 (islam)

Hudhaifa bin Al-Yaman came to `Uthman at the time when the people of Sham and the people of Iraq
were Waging war to conquer Arminya and Adharbijan. Hudhaifa was afraid of their (the people of
Sham and Iraq) differences in the recitation of the Qur'an, so he said to `Uthman, "O chief of the
Believers! Save this nation before they differ about the Book (Qur'an) as Jews and the Christians did
before." So `Uthman sent a message to Hafsa saying, "Send us the manuscripts of the Qur'an so that
we may compile the Qur'anic materials in perfect copies and return the manuscripts to you." Hafsa
sent it to `Uthman. `Uthman then ordered Zaid bin Thabit, `Abdullah bin AzZubair, Sa`id bin Al-As
and `AbdurRahman bin Harith bin Hisham to rewrite the manuscripts in perfect copies. `Uthman said
to the three Quraishi men, "In case you disagree with Zaid bin Thabit on any point in the Qur'an, then
write it in the dialect of Quraish, the Qur'an was revealed in their tongue." They did so, and when they
had written many copies, `Uthman returned the original manuscripts to Hafsa. `Uthman sent to every
Muslim province one copy of what they had copied, and ordered that all the other Qur'anic materials,
whether written in fragmentary manuscripts or whole copies, be burnt. - Hadith Al Bukhari 4987 (islam)
Book 66, Hadith 9
Vol. 6, Book 61, Hadith 510

And the word of your Lord has been fulfilled in truth and in justice. None can alter His words, and He is the Hearing, the Knowing. - Quran Al-An'am(The Cattle) 6:115 (islam)

[21]But this is an honored Qur'an
[22][Inscribed] in a Preserved Slate. - Quran Al-Buruj(The Mansions of the Stars) 85:21-22 (islam)

So woe to those who write the "scripture" with their own hands, then say, "This is from Allah," in order to exchange it for a small price. Woe to them for what their hands have written and woe to them for what they earn. - Quran Al-Baqarah(The Cow) 2:79 (islam)

[4]And those who disbelieve say, "This [Qur'an] is not except a falsehood he invented, and another people assisted him in it." But they have committed an injustice and a lie.
[5]And they say, "Legends of the former peoples which he has written down, and they are dictated to him morning and afternoon." - Quran Al-Furqan(The Criterion) 25:4-5 (islam)