That doesn't really make sense. The Bible has been changed so many times over the centuries everybody knows this.
Third-century church father Origen on the copies of the Gospels:
“The differences among the manuscripts have become great, either through the negligence of some copyists or through the perverse audacity of others; they either neglect to check over what they have transcribed, or, in the process of checking, they make additions or deletions as they please”.
Orthodox bishop of Corinth named Dionysius:
“When my fellow-Christians invited me to write letters to them I did so. These the devils’ apostles have filled with tares, taking away some things and adding others. For them the woe is reserved. Small wonder then if some have dared to tamper even with the word of the Lord Himself, when they have conspired to mutilate my own humble efforts”.
“Not only do we not have the originals, we don’t have the first copies of the originals. We don’t even have the copies of the copies of the originals, or copies of the copies of the copies of the originals. What we have are copies made much later-much later. In most instances, they are copies made many centuries later. And these copies all differ from one another, in many thousands of places….Possibly it is easiest to put it in comparative terms: There are more differences among our manuscripts than there are words in the New Testament.”
A statement from the Church father himself is proof enough. After all, why would a Church father of all people say that there are "great differences" in the Bible if there wasn't? That doesn't make sense!
But if you want proof here are some contradictions:
Mark 2: Jesus is confronted by the Pharisees because Jesus and his disciples ate grain on the Sabbath. So Jesus reminded them of what King David done (ate the bread reserved for the priests in the Temple when Abiathar was the high priest). However, the Old Testament verse that Jesus is reciting (1 Sam 21:1-6) says, in actual fact, that David did not do this when Abiathar was the high priest but when Abiathar’s father, Ahimelech, was.
Mark 4: Jesus says that the mustard seed is the “smallest of all seeds on earth”.
Mark 14:12; 15:25: Jesus died after the Passover meal was eaten.
John 19:14: Jesus died before it was eaten.
Luke 2:39: After Jesus’ birth, Joseph and Mary returned to Nazareth just over a month after they had come to Bethlehem and performed the rites of purification.
Matthew 2:19-22: Matthew indicates they fled to Egypt.
Galatians 1:16-17: Paul says that after he converted on the way to Damascus he did not go to Jerusalem to see those who were apostles before him.
Acts 9:26: Says that was the first thing he did after leaving Damascus.
By Bart D. Ehrman "Misqouting Jesus"