Numbers 35:27
And the revenger of blood find him without the borders of the city of his refuge, and the revenger of blood kill the slayer; he shall not be guilty of blood:
Exodus 22:2
If a thief be found breaking up, and be smitten that he die, there shall no blood be shed for him.
Deuteronomy 19:6
Lest the avenger of the blood pursue the slayer, while his heart is hot, and overtake him, because the way is long, and slay him; whereas he was not worthy of death, inasmuch as he hated him not in time past.
Deuteronomy 19:10
That innocent blood be not shed in thy land, which the LORD thy God giveth thee for an inheritance, and so blood be upon thee.