Numbers 35:6-8

6The cities which you shall give to the Levites shall be the 1six cities of refuge, which you shall give for the manslayer to flee to; and in addition to them you shall give forty-two cities. 7All the cities which you shall give to the Levites shall be 2forty-eight cities, 3together with their pasture lands. 84As for the cities which you shall give from the possession of the sons of Israel, you shall take more from the larger and you shall take less from the smaller; each shall give some of his cities to the Levites in proportion to his possession which he inherits.”