וַיִּתְּנ֥וּ בְנֵי־יִשְׂרָאֵ֖ל לַלְוִיִּ֑ם אֶת־הֶעָרִ֖ים וְאֶת־מִגְרְשֵׁיהֶֽם׃
So the children of Israel gave to the Levites the cities with the open land about them.
Read midrashic interpretation of I Chronicles 6:49: and classical rabbinic exegesis.