I think this explains it:
2 Timothy 3:16King James Version (KJV)
16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
Also in Wiki we see that:
Mosaic authorship, or
leMoshe miSinai ("given to Moses on Sinai") is the
Jewish tradition (later adopted by Christian scholars) that the
Torah was dictated to
Moses by
God, with the exception of the last eight verses of
Deuteronomy, which describe the death and burial of Moses.
In Luke:
Luke 16:17 *
17 And
it is easier for heaven and earth to pass, than one tittle of the law to fail.
We also get this from Revelation:
Revelation 22:18 - 19*
18 For I testify unto every man that heareth the words of the prophecy of this book, I
f any man shall add unto these things, God shall add unto him the plagues that are written in this book: 19
And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and [from] the things which are written in this book.