Numbers 35:27
and the avenger of blood finds him outside the border of his city of refuge and kills him, the avenger will not be guilty of bloodshed,
Exodus 22:2
Deuteronomy 19:6
Otherwise, the avenger of blood in the heat of his anger
Deuteronomy 19:10
In this way, innocent blood will not be shed, and you will not become guilty of bloodshed in the land the Lord your God is giving you as an inheritance.