Joshua 21:3

And the children of Israel gave The successor of Moses did not fail to carry out faithfully the Divine Command, and preparations were made for assigning to them certain cities for their possession.

out of their inheritance "Distinctness and diffusion" were the great points to be attained in their case, and therefore out of the inheritance of their brethren provision was made for them in such a way that, as during the wanderings they had guarded the Tabernacle of Jehovah, so now they should be "scattered" as widely as possible in Israel, to bear witness that the people still owed allegiance to Him.