'Blood' in the Bible

Anyone who kills a person by accident or unintentionally may flee there; they will be for yourselves a refuge from the avenger of blood.

And if the avenger of blood pursues after him, they will not hand over the killer into his hand, because he killed his neighbor unintentionally, and {he did not hate him previously}.

These were the cities designated for all the {Israelites}, and for the foreigners dwelling among them, for anyone that kills a person unintentionally to flee there, and not die by the hand of the avenger of blood, {until there is a trial} before the congregation.