'Slayer' in the Bible

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

It is given to be polished, that it may be handled; the sword is sharpened and polished, to give it into the hand of the slayer.

‘Will you still say, “I am a god,”In the presence of your slayer,Though you are a man and not God,In the hands of those who wound you?