Num Numbers, chapter Book of Numbers, chapter 35
And the suburbs of the cities, which you2f shall give unto the Levi’im (Levites) [Joined to], [shall reach] from the wall of the city and outward a thousand cubits round about.
And you2f shall measure from without the city on the east side two thousand cubits, and on the south side two thousand cubits, and on the west side two thousand cubits, and on the north side two thousand cubits; and the city [shall be] in the midst: this shall be to them the suburbs of the cities.Jos 21:12