Strong G1556 ἐκδικέω ekdikeō · to avenge

Revelation

1. Revelation 6:10
   And they cried with a loud voice, saying, How long, O Lord, holy and true, dost thou not judge and avenge our blood on them that dwell on the earth?
2. Revelation 19:2
   For true and righteous are his judgments: for he hath judged the great whore, which did corrupt the earth with her fornication, and hath avenged the blood of his servants at her hand.