Revelation 6:10

And they cried with a loud voice, and said, How long, O sovereign Lord, holy and true, before thou dost judge, and avenge our blood upon those who dwell on the earth?

Revelation 18:20-24

Rejoice over her, thou heaven, and you saints, and apostles, and prophets; for on your account God has pronounced sentence upon 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, and said, How long, O sovereign Lord, holy and true, before thou dost judge, and avenge our blood upon those who dwell on the earth?
Revelation 18:20
Rejoice over her, thou heaven, and you saints, and apostles, and prophets; for on your account God has pronounced sentence upon her.