Numbers 35:4-6

Amplified Bible, Classic Edition

⁴ And the pasturelands of the cities which you shall give to the Levites shall reach from the wall of the city and outward 1,000 cubits round about.

⁵ You shall measure from the wall of the city outward on the east, south, west, and north sides 2,000 cubits, the city being in the center. This shall belong to [the Levites] as [suburb] pasturelands for their cities.

⁶ Of the cities which you shall give to the Levites there shall be the six cities of refuge, which you shall give for the manslayer to flee into; and in addition to them you shall give forty-two cities.