Numbers 35:27
and the blood avenger finds him outside the border of his city of refuge, and the blood avenger kills the manslayer, he will not be guilty of blood
Exodus 22:2
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Deuteronomy 19:6
otherwise the avenger of blood might pursue the manslayer
Deuteronomy 19:10
So innocent blood will not be shed in the midst of your land which the Lord your God gives you as an inheritance, and