'Avenger' in the Bible

The cities shall be to you as a refuge from the avenger, so that the one who has caused the death of another will not be killed until he has had a [fair] trial before the congregation.

The blood avenger shall himself put the murderer to death; he shall put him to death when he meets him.

or if, in enmity, he struck the victim down with his hand, and he died, the one that struck the victim shall certainly be put to death; he is a murderer. The blood avenger shall put the murderer to death when he meets him.

then the congregation shall judge between the offender and the blood avenger according to these ordinances.

The congregation shall rescue the offender from the hand of the blood avenger and return him to his city of refuge, [the place] to which he had escaped; and he shall live there until the death of the high priest who was anointed with the sacred oil.

and the blood avenger finds him outside the border of his city of refuge and kills the offender, the blood avenger will not be guilty of murder,

otherwise the avenger of blood might pursue the offender in the heat of anger, and overtake him, because it is a long way, and take his life, even though he did not deserve to die, since he did not hate his neighbor beforehand.

then the elders of his own city shall send for him and have him taken back from there and turn him over to the avenger of blood, so that he may be put to death.

so that the person (manslayer) who kills any person unintentionally, without premeditation, may flee there, and they shall be your refuge from the blood avenger.

If the blood avenger pursues him, they shall not hand the offender (manslayer) over to him, because he killed his neighbor unintentionally and without premeditation and did not hate him beforehand.

These were the appointed cities for all the Israelites and for the stranger sojourning (living temporarily) among them, so that whoever killed any person unintentionally may flee there, and not die by the hand of the blood avenger until he had stood before the congregation [for judgment].

Then she said, “Please let the king remember the Lord your God, so that the avenger of blood will not continue to destroy, otherwise they will destroy my son.” And David said, “As the Lord lives, not a single hair [from the head] of your son shall fall to the ground.”

Out of the mouths of infants and nursing babes You have established strengthBecause of Your adversaries,That You might silence the enemy and make the revengeful cease.

and that [in this matter of sexual misconduct] no man shall transgress and defraud his brother because the Lord is the avenger in all these things, just as we have told you before and solemnly warned you.