New Defender's Study Bible Notes
20:7 which is Hebron. Hebron was the city–and mountain–requested and conquered by Caleb. However, he was willing to give it to the Levites as one of their designated cities of refuge (note Joshua 21:11-13).
21:41 forty and eight cities. The Levites had no one province assigned to them, as the other tribes did, for they were to be spiritual teachers and counselors to all the people. They were accordingly given forty-eight strategically located cities, including the six cities of refuge (Numbers 35:1-8), and a goodly portion of their support was to come from the tithes and offerings of the other tribes (e.g., Numbers 18:21).