Haven't I commanded you? Be strong and of good courage; don't be afraid, neither be dismayed: for Yahweh your God is with you 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.