Numbers 35:1-6

1 And the Lord spoke these things also to Moses in the plains of Moab by the Jordan, over against Jericho:
2 Command the children of Israel that they give to the Levites out of their possessions,
3 Cities to dwell in, and their suburbs round about: that they may abide in the towns, and the suburbs may be for them cattle and beasts:
4 Which suburbs shall reach from the walls of the cities outward, a thousand paces on every side:
5 Toward the east shall be two thousand cubits: and toward the south in like manner shall be two thousand cubits: toward the sea also, which looketh to the west, shall be the same extent: and the north side shall be bounded with the like limits. And the cities shall be in the midst, and the suburbs without.
6 And among the cities, which you shall give to the Levites, six shall be separated for refuge to fugitives, that he who hath shed blood may flee to them: and besides these there shall be other forty-two cities,
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