'Cities of Refuge' in the Bible

And the cities which ye shall give to the Levites, six cities of refuge, which ye shall give to flee there to the slayer: and upon them ye shall give forty and two

And build ye to you cities; cities of refuge shall they be to you; and the slayer to flee there smiting a soul in error.

And the cities which ye shall give, six cities of refuge shall be to you.

Three cities shall ye give from beyond Jordan, and three cities shall ye give in the land of Canaan; cities of refuge shall they be.