Numbers 35:4-5

“The pasture lands around the cities which you shall give to the Levites shall reach from the wall of the city and outward a thousand cubits (1,500 ft.) around. You shall also measure outside the city on the east, south, west, and north sides two thousand cubits (3,000 ft.), with the city in the center. This shall belong to the Levites as pasture lands for the cities.