The Qur’an belongs only to Allah. There is no single word from Prophet Muhammad in the Qur’an. Whereas, contemporary Bibles do not contain even the words of Prophet Jesus, let alone the words of Allah.
For example:
JOHN; The Death of Jesus (28-30)
Later, knowing that all was now completed, and so that the Scripture would be fulfilled, Jesus said, "I am thirsty." 29A jar of wine vinegar was there, so they soaked a sponge in it, put the sponge on a stalk of the hyssop plant, and lifted it to Jesus' lips. 30When he had received the drink, Jesus said, "It is finished." With that, he bowed his head and gave up his spirit.
If this section, which contains 72 words, has only six words from Prophet Jesus: “I am thirsty” and “It is finished”, who then expressed the other words? If these words belong to the witnesses, what do we call the Bible, the word of Allah or is it witnesses’ testimony? Is it an inquiry or a theocratic history book?
The Acts of Apostles
The Acts of the Apostles in the Bible include the events that occurred in Christianity after the time of Prophet Jesus with his disciples. Anything written about events after Prophet Jesus has been added and they are the words of humans. When we look at the Qur’an, there is no single word regarding the rise of Islam or what the companions of the Prophet did after his death. It is clear that the Qur’an is the only book that preserves its divine status with no additions at all.

The Epistles
In the section known as The Epistles of the Bible, there are 21 letters that were written by Paul, Peter, John, Joseph and Judas to certain people and communities. These are clearly the words of humans and a latter addition to the Bible.
When we look at the Qur’an, it does not contain even a word from the letters written to kings and governors by Prophet Muhammad, let alone the letters written to other people and communities by the four caliphs and the Companions.
The accuracy of the epistles written by Paul, Peter, John, Joseph and Judas is still debated, because we do not know where their originals are or where they came from.
In year seven A.H., Prophet Muhammad sent the following letters:
A letter to the King of the Byzantines, Heraclius,
A letter to Chosroes, Emperor of Persia
A letter to the Negus, king of Abyssinia (Ethiopia)
A letter to the Vicegerent of Egypt, called Muqawqas
A letter to Harith bin Abi Shamir Al-Ghassani, King of Damascus
A letter to Haudha bin ‘Ali, Governor of Yamama
He sent these letters with special envoys. Although some of the letters disappeared or were torn up, two of them, the letters to the Heraclius and Muqawqas, still exist in their original parchment form and can be seen in Topkapi Palace Museum and the Amman Museum. The text of the letters is as below:

In the Name of Allah, Most Gracious, Most Merciful.
From Muhammad servant of Allâh and His Messenger to Muqawqas, vicegerent of Egypt. Peace be upon him who follows true guidance. Thereafter, I invite you to accept Islam. Therefore, if you want security, accept Islam. If you accept Islam, Allâh, the Sublime, shall reward you doubly. But if you refuse to do so, you will bear the burden of the transgression of all the Copts.

In the Name of Allah, Most Gracious, Most Merciful.