Numbers 35:3-5

3These towns will be for the Levites to live in, and the surrounding lands will provide pasture for their cattle, flocks, and other livestock.

4The pastureland assigned to the Levites around these towns will extend 1,500 feet from the town walls in every direction.

5Measure off 3,000 feet outside the town walls in every direction—east, south, west, north—with the town at the center. This area will serve as the larger pastureland for the towns.