Numbers 35:27
and the blood-redeemer, find him, outside the bounds of his city of refuge, then may the blood-redeemer slay the slayer, without being guilty of blood;
Exodus 22:2
If, in the place of breaking in, the thief be found and he is smitten so that he dieth, there is due for him no shedding of blood:
Deuteronomy 19:6
lest the blood redeemer pursue the manslayer because his heart is hot, and overtake him because the way is long, and he smite him so as to take away his life, - he not being worthy of death, seeing that he had not been hating him aforetime.
Deuteronomy 19:10
that innocent blood may not be sired in the midst of thy land, which Yahweh thy God is giving unto thee as an inheritance, - and so shed-blood be upon thee.