Retaliation, law of, or lex talionis means in the bible: Ex. 21:23-25; Lev. 24:18-21; Deut. 19:21. 19:21. The wrongdoing should not go unpunished, but the punishment shouldn’t be excessive or vindictive. The Sermon on Mount Matt. 5:38-42 The Lord takes it a step further and exhorts us to not retaliate against anyone, insofar as we are concerned with private wrongs. 12:17, 19. Revenge also available.
(in Bible Dictionary)