This book of the law shall not depart out of your mouth, but you shall meditate thereon day and night, that you may observe to do according to all that is written therein: for then you shall make your way prosperous, and then you shall have good success.
THE PSALMS: There are so many references to the Pentateuch in the Psalms that it would take a volume to list them all.  As one of a hundred examples, read  Psalms 135:8-12.