Deuteronomy 19:3 in the World English Bible
You shall prepare the way, and divide the borders of your land which the LORD your God causes you to inherit into three parts, that every man slayer may flee there.
Context
2 Thou shalt separate three cities for thee in the midst of thy land, which the LORD thy God giveth thee to possess it.
3 Thou shalt prepare thee a way, and divide the coasts of thy land, which the LORD thy God giveth thee to inherit, into three parts, that every slayer may flee thither.
4 And this is the case of the slayer, which shall flee thither, that he may live: Whoso killeth his neighbour ignorantly, whom he hated not in time past;