The following is from www.churches-of-christ.net/tracts/job083u.htm
IS THE BIBLE CORRUPTED?
“Say: ‘People of the Book (Christians and Jews), you stand for nothing until you observe the Torah and the Gospel and that which is revealed to you from your Lord.”
“0 believers, have faith in Allah and His Apostle, in the Book He has revealed to His Apostle, and in the Book He formerly revealed (Bible). He that denies Allah, His angels, His Scriptures, His apostles, and the Last Day, has strayed far from the truth.”
“And to you we have revealed the Book with the truth confirming what was revealed before it in the other Books, and standing as a guardian over it.”
Muslims often say that the Bible has been corrupted and cannot be trusted now. The Quran never said this and Prophet Muhammed never said this. The above verses from the Quran shows the confidence that Muhammed had in the Bible and how Allah instructed the people to trust the Bible.
In Sura 5:48 the Quran was to be the guardian of all the previously revealed Scriptures. If the Bible was corrupted, then the Quran failed in its work. If the Bible was corrupted, when and where and how was it corrupted? Was it corrupted before Muhammed’s time or after? If it was before his time, then why did he not say so and why did he tell his people to read the Law and the Gospel? If it was after his time, then why do we have ancient copies of the Bible that are much older than Muhammed that read exactly the same as the Bible today?
In the following verse Sura 5:43 (Al-Maida) the Quran confirms the truthfulness of the Torah (Law of Moses, Old Testament). When Prophet Muhammed met some Jews in Arabia, Allah said to him,
“But why do they come to you for judgment when they already have the Torah in which is Allah’s own judgment?”
Furthermore, in Sura 5:47, the Quran says,
“Let the followers of the Gospel judge in accordance with what Allah has revealed therein. Evil doers are those who do not base their judgments on Allah’s revelations.”
“If thou (Muhammed) art in doubt concerning that which we reveal unto thee, then question those who read the Scriptures before thee.”
This confirms that the Bible was known to Prophet Muhammed and he had full confidence in its truthfulness. Prophet Muhammed was told to refer to the Christians for fuller spiritual understanding. If the Bible was corrupted, why was Muhammed told to look to the Bible for a better spiritual understanding?
The Bible was fully written and confirmed and compiled by the Lord 500 years before Muhammed was even born. Sura 6:115 (AI-An’am) says: “Perfected are the words of your Lord in truth and justice. None can change them. He is the Hearing, the Knowing.”
The Torah and the Gospel are the word of the Lord, according to the Quran, so no one can change them! If the Bible has been changed, as some Muslims will argue, then the Quran is not true. No, the Bible has not been changed; it must be studied and respected as the Word of God.
“And do not argue with the people of the Book (Jews and Christians) except in the best way, unless it be with those among them who do evil. Say: ‘We believe in that which is revealed to us and which was revealed to you. Our God and your God is one. To Him we surrender ourselves”
These verses in the Quran make it obvious that the Bible was not corrupted. If the Bible was not corrupted, then it is true in what it says.