Numbers 35:4-6

Young's Literal Translation

⁴ `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.

⁵ 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.

⁶ `And the cities which ye give to the Levites [are] the six cities of refuge, which ye give for the fleeing thither of the man-slayer, and besides them ye give forty and two cities;