Revelation 6:10

And they cried with a loud voice, How long will it be, O sovereign, the holy one and the true, ere thou judge and avenge our blood on those who dwell on the earth?

Revelation 18:20-24

Rejoice over her, thou heaven, and ye the holy apostles and prophets, for God hath adjudged her to punishment, for the judgment inflicted on you by her.

Treasury of Scripture Knowledge

Summary

Because thou hast spoiled many nations, all the remnant of the people shall spoil thee; because of men's blood, and for the violence of the land, of the city, and of all that dwell therein.

Bible References

The violence

Revelation 6:10
And they cried with a loud voice, How long will it be, O sovereign, the holy one and the true, ere thou judge and avenge our blood on those who dwell on the earth?
Revelation 18:20
Rejoice over her, thou heaven, and ye the holy apostles and prophets, for God hath adjudged her to punishment, for the judgment inflicted on you by her.