This is a good read. So here we cannot say the bible was plagiarized, but we can say Abrahamic traditions were plagiarized.
http://wn.com/quran_copied_apocrypha!_blatant_plagiarism!
Quran copied Apocrypha! Blatant Plagiarism!
The Apocryphal gospels which are
plagiarised by the Koran include: The Gospel of James, or Protevangelium (140-170 AD) The Gospel of Pseudo-Matthew (5th Century- 6th Century AD) The History of Joseph the Carpenter (5th Century AD) The Gospel of The Nativity of Mary The Arabic Gospel of The Infancy of The Saviour (5th Century AD) The Infancy Gospel of Thomas (80-105 AD) All of theses Gospels have stories which were inserted into the 7th Century Koran. Its Undeniable that Christianity had a huge influence upon Islam and the formation of the Koran. As Mohammad knew nothing of Jesus who lived 600 years earlier he had to rely on the Apocryphal stories in his Koran
This is all similar to what a heretical priest would find valuable.