Joshua 20:2-6

2“Tell the Israelites: Select your cities of refuge, as I instructed you through Moses,

3so that a person who kills someone unintentionally or accidentally may flee there. These will be your refuge from the avenger of blood.

4When someone flees to one of these cities, stands at the entrance of the city gate, and states his case before the elders of that city, they are to bring him into the city and give him a place to live among them.

5And if the avenger of blood pursues him, they must not hand the one who committed manslaughter over to him, for he killed his neighbor accidentally and did not hate him beforehand.

6He is to stay in that city until he stands trial before the assembly and until the death of the high priest serving at that time. Then the one who committed manslaughter may return home to his own city from which he fled.”