And about the Holy-Bible:
The Old Testament is considered to be the actual word of the Living God. Of course it does contain hidden text to disguise the use and practice of certain transcendental fruits such as the one that grew upon the Tree of Knowledge in the Garden of Eden. (but that is a whole other story)
The New Testament however is not considered to be true in accordance to Old Testament law of Deuteronomy Chapter 19 Verse 15. None of the Testimonies of Jesus are considered by religious law to be true nor is the word of his disciples whos very Testimonies go into making up the New Testament.
Jesus was making claims that were not possibly true and he lacked witness evidence to prove his false claims. So in that alone Muhammad was standing against Old Testament law of deuteronomy Chapter 19 Verse 15 in believing in Jesus at all. Or trusting the word of his disciples.
So Old Testament part of the Bible is valid but the new Testament is not valid in accordance to religious law.