§ 02 · King James Bible
Joshua 20:9
These were the cities appointed for all the children of Israel, and for the stranger that sojourneth among them, that whosoever killeth any person at unawares might flee thither, and not die by the hand of the avenger of blood, until he stood before the congregation.
Simple English
These cities were designated for all Israel's children and anyone living with them. People could run to these cities if they accidentally killed someone. They would be safe there from the person seeking revenge until they faced the entire community.
* Work in progress - there may be occasional inaccuracies