Deuteronomy 19:1-3

Darby Translation

19 When Jehovah thy God hath cut off the nations whose land Jehovah thy God giveth thee, and thou hast dispossessed them, and dwellest in their cities and in their houses,

² thou shalt separate three cities for thyself in the midst of thy land, which Jehovah thy God giveth thee to possess.

³ Thou shalt prepare thee the way, and divide the territory of thy land, which Jehovah thy God giveth thee to inherit, into three parts, so that every slayer may flee thither.