Abdullah, the NT nowhere copies OT sources and claims it as new revelation
secondly, the arabic version of the bible was never used as a source for the quran, we agree on that one here... if Muhammed did use the original injil instead of heretic gospels their wouldn't be so many enormous theological errors in the quran
i'll quote you an example, of clear stealing done by muhammed...
The Qur'an (E.H. Palmer tr), Sura 19 - Mary (600-800AD):
So she conceived him, and she retired with him into a remote place. And the labour pains came upon her at the trunk of a palm tree, and she said, 'O that I had died before this, and been forgotten out of mind!' and he called to her from beneath her 'Grieve not, for thy Lord has placed a stream beneath thy feet, and shake towards thee the trunk of the palm tree, it will drop upon thee fresh dates fit to gather; so eat, and drink, and cheer thine eye; and if thou shouldst see any mortal say, "Verily, I have vowed to the Merciful One a fast, and I will not speak to-day with a human being."' Then she brought it to her people, carrying it; said they, 'O Mary! thou hast done an extraordinary thing! O sister of Aaron! thy father was not a bad man, nor was thy mother a harlot!' And she pointed to him, and they said, 'How are we to speak with one who is in the cradle a child?' He said, 'Verily, I am a servant of God; He has brought me the Book, and He has made me a prophet, and He has made me blessed wherever I be; and He has required of me prayer and almsgiving so long as I live, and piety towards my mother, and has not made me a miserable tyrant; and peace upon me the day I was born, and the day I die, and the day I shall be raised up alive.' That is, Jesus the son of Mary,-by the word of truth whereon ye do dispute!
The Pseudo Gospel Of Matthew (400 AD):
Chapter 20
And it came to pass on the third day of their journey, while they were walking, that the blessed Mary was fatigued by the excessive heat of the sun in the desert; and seeing a palm tree, she said to Joseph: Let me rest a little under the shade of this tree. Joseph therefore made haste, and led her to the palm, and made her come down from her beast. And as the blessed Mary was sitting there, she looked up to the foliage of the palm, and saw it full of fruit, and said to Joseph: I wish it were possible to get some of the fruit of this palm. And Joseph said to her: I wonder that thou sayest this, when thou seest how high the palm tree is; and that thou thinkest of eating of its fruit. I am thinking more of the want of water, because the skins are now empty, and we have none wherewith to refresh ourselves and our cattle. Then the child Jesus, with a joyful countenance, reposing in the bosom of His mother, said to the palm: O tree, bend thy branches, and refresh my mother with thy fruit. And immediately at these words the palm bent its top down to the very feet of the blessed Mary; and they gathered from it fruit, with which they were all refreshed. And after they had gathered all its fruit, it remained bent down, waiting the order to rise from Him who had commanded it to stoop. Then Jesus said to it: Raise thyself, O palm tree, and be strong, and be the companion of my trees, which are in the paradise of my Father; and open from thy roots a vein of water which has been hid in the earth, and let the waters flow, so that we may be satisfied from thee. And it rose up immediately, and at its root there began to come forth a spring of water exceedingly clear and cool and sparkling. And when they saw the spring of water, they rejoiced with great joy, and were satisfied, themselves and all their cattle and their beasts. Wherefore they gave thanks to God.
The First Gospel in the Infancy of Jesus Christ (200-400AD)
1. We find (1) what follows in the book of Joseph the high priest, who lived in the time of Christ. Some say that he is Caiaphas. (2) He has said that Jesus spoke, and, indeed, when he was lying in His cradle said to Mary His mother: I am Jesus, the Son of God, the Logos, whom thou hast brought forth, as the Angel Gabriel announced to thee; and my Father has sent me for the salvation of the world.
and i'm not the only one who made this claim, his early critics claimed exactly that, that muhammed was plagiarizing older stories
"These are nothing but tales of the ancients." 6:25
The similarities are too big to discard, and put this together with the story of the clay bird copied from the infancy gospels, and the hundreds of other indications to minor and big plagiaritism and you would have no other choice to conclude what i and countless of scholars have indicated and are indicating... muhammed was a fraud