Numbers 35:2-8

ECB(i) 2 Misvah the sons of Yisra El, to give the Leviym cities to settle for the inheritance of their possession: and also give the Leviym suburbs for the cities all around them: 3 and the cities to settle in are for them; and the suburbs are for their animals and for their acquisitions and for all their live beings. 4 And the suburbs of the cities you give the Leviym, are from the wall of the city and outward - a thousand cubits all around: 5 and measure from outside the city - on the east edge two thousand cubits and on the south edge two thousand cubits and on the seaward edge two thousand cubits and on the north edge two thousand cubits; with the city in the middle: these are their suburbs of the cities. 6
ALLOTTING CITIES OF REFUGE TO THE LEVIYM
And the cities you give to the Leviym, six cities are for refuge to give the murderer to flee to: and give them forty-two cities. 7 So all the cities you give to the Leviym, forty-eight cities - them with their suburbs: 8 and the cities you give are of the possession of the sons of Yisra El: from the many, you greaten; and from the few, you lessen: every man gives of his cities to the Leviym according to the mouth of the inheritance he inherits.