Deuteronomy 19:6

19:6 Otherwise the blood avenger will chase after the killer in the heat of his anger, eventually overtake him, and kill him, though this is not a capital case since he did not hate him at the time of the accident.

Deuteronomy 32:43

32:43 Cry out, O nations, with his people,

for he will avenge his servants’ blood;

he will take vengeance against his enemies,

and make atonement for his land and people.