Numbers 35:4-6

Amplified Bible

⁴ “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. ⁵ 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.

Cities of Refuge

⁶ [Among] the cities which you give to the Levites shall be the six cities of refuge, which you shall provide for the one who commits manslaughter to flee to; and in addition to them you shall give forty-two cities [to the Levites].