Joshua 13:7 - Joseph Benson’s Commentary on the Old and New Testaments

Now, therefore, divide this land Both that which was conquered and that which remained unconquered was to be divided, that every tribe might know what belonged to them by God's gift, and be encouraged to attempt the conquest of it when they were able; might be preserved from entering into any covenant or society with those who kept their inheritance from them; and likewise with a view to hinder the unconquered people from joining their forces together to recover their country, the Israelites inhabiting the cities and fields that lay between them.