NET
3 Anyone who accidentally kills someone can escape there; these cities will be a place of asylum from the avenger of blood.
Darby
3 that the slayer who unwittingly without intent smiteth any one mortally may flee thither: and they shall be your refuge from the avenger of blood.
KJV
3 That the slayer that killeth [any] person unawares [and] unwittingly may flee thither: and they shall be your refuge from the avenger of blood.