Numbers 35:4-5

`And the suburbs of the cities which ye give to the Levites are , from the wall of the city and without, a thousand cubits round about.

And ye have measured from the outside of the city, the east quarter, two thousand by the cubit, and the south quarter, two thousand by the cubit, and the west quarter, two thousand by the cubit, and the north quarter, two thousand by the cubit; and the city is in the midst; this is to them the suburbs of the cities.