If we compare every copy of the Quran with each other, we will find they match perfectly word for word - from the oldest copies to the ones printed just today. No human hand has changed it...
"Do
they not then consider the Qur'an carefully? Had it been from other than Allah,
they would surely have found therein much contradiction and error."
[Qur'an, An-Nisa 4:82]
Are there scientifically proven "miracles" in the Quran?
Read the Quran in your language
What is the Quran?
How can Muslims be assured that the Qur'an is the Word of God?
The Amazing Qur'an Very good
The Bible, the Quran, and Science very good