What do we learn from "mi'Teiman"?
Rashi: Verse 3 discussed what was left in the south to conquer, from east to west. This verse discusses the width of what remained to conquer, from south to north.
Radak: From the south (the entire land of the Kena'ani remained).
What does Teiman refer to?
Rashi: It is the cave of the Tzidonim.