Only be strong and very courageous, to observe to do according to all the law, which Moses my servant commanded you: don't turn from it to the right hand or to the left, that you may have good success wherever you go.
JUDGES: Like every other book in the Bible, the shadow and teaching of the Pentateuch lie over every word of it.  Look at  Judges 1:27-34, where it is recounted how various tribes of Israel did not "drive out the inhabitants of the land."  But, indeed why were they expected to drive them out?  It is in the teachings of the Pentateuch that they were commanded to drive them out.