'Avenger' in the Bible

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

And 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.

These are the cities appointed for all the Israelites and foreigners among them, so that anyone who kills a person unintentionally may flee there and not die at the hand of the avenger of blood until he stands before the assembly.