The Old Testament and the New Testament is the Bible of the Christians.
The Bible’s historical time period is preceding Muhammad.
Proverbs: 30:5-6 (NIV) tells us “Every word of God is flawless; He is a shield to those who take refuge in Him. Do not add to His words, or He will rebuke you and prove you a liar.
There are 192 Greek New Testament manuscripts predating Muhammad that are currently in existence available for study.
There are 33 translations of the Greek New Testament predating Muhammad
that are in existence.
There are 230 manuscripts that all agree with the thousands of manuscripts that exist dating from and after Muhammad’s time up until our present Bibles.
The papyrus fragment is the earliest manuscript known. It is dated with certainty to at least AD 125. It is housed at the John Rylands Library in Manchester. There are two Greek fragments from the Dead Sea Scrolls that may very well be from the Gospel of Mark and I Timothy. Both fragments date AD 70. The earliest complete copy of the New Testament is the Codex Sinaiticus which dates to the AD 300’s. It is on public display in the British Museum in London.
Between all the manuscripts there are many variants in the texts, primarily consisting of scribal errors. None of these variants affect any major or minor doctrine of the Christian faith. The content of the New Testament is not in question.
The New Testament is 99.5% accurate with the other .5% in dispute fully available for study. It is not a question of the .5% being missing. This .5% is included so that none of Gods’ word is mistakenly excluded. The .5% cannot contaminate the 99.5%. God will and has preserved His word.
The most significant attempt known to change versions of the Bible was before the time of Muhammad by Marcion (died AD 160). Because of his theological ideas he rejected the entire Old Testament, and only accepted ten of Paul’s epistles and changed the Gospel of Luke omitting all Old Testament references. He also did not believe that Jesus was a man but only appeared to be.
The most modern attempt to change the Bible was by the Jehovah’s Witnesses. Although they did not try to change the original text of the Greek, Hebrew and Aramaic translations they tried to correct all other English translations of the Bible which they believed to be corrupt. Yet none of the translators had a degree in Greek or Hebrew. Their translations are all done to line up with their particular peculiar doctrines. Their lack of success can be seen in that this sect is the only one who uses this translation