Numbers 35:27
And the nearest relation of blood finding him without the boundary of the city of his refuge, and the nearest relation of blood slew the slayer; no blood to him.
Exodus 22:2
If in breaking in a thief shall be found, and he was smitten and died, no bloods for him.
Deuteronomy 19:6
Lest the nearest relative of blood shall pursue after the slayer when his heart shall be warm, and overtaking him, for the way shall be great, and he smote him in soul; and to him not the judgment of death for he hated him not from yesterday the third day
Deuteronomy 19:10
And innocent blood shall not be poured out in the midst of thy land which Jehovah thy God gave to thee an inheritance, and bloods were upon thee.