Well it includes books of the Tanakh, which is the Hebrew Bible or protocanon.  In some Christian denominations it includes deuterocanonical books.
Since the Old Testament includes books of the Hebrew bible, I think it came from the jewish
The Bible is my favorite book. It's pretty old, but it has some very interesting stories. Oh really!  I know that different Christan groups have varying attitudes towards the book. Yeah! There's so many different interpretations by different Christian groups. I wonder how far back it dates... Well the New Testament was first written in Koine Greek, in the first century.  It's a collection, and was written by early Christians.  It's thought they were Christ's Jewish disciples. That's pretty old.  What do you know about the Old Testament?
The Old Testament includes the books of the Hebrew Bible (Tanakh) or protocanon, and in various Christian denominations also includes deuterocanonical books.