Revelation 16:6
For they [i.e., the followers of the beast. See verse 2] have shed the blood of God's holy people and [their] prophets, and you have given them blood to drink because they deserved it [i.e., these persecutors deserved the punishment they received for shedding blood].
Revelation 14:20
Then the [grapes in the] winepress were trampled on outside of the city and blood flowed out of the winepress as deep as the horses' bridles for a distance of one hundred and eighty-four [square] miles.
Revelation 15:3-4
And they were singing the song of Moses, the servant of God, and the song of the Lamb. [The words were], "Your deeds are great and marvelous, O Lord, God Almighty; your ways are just and true, O King of the nations [or, "ages"].
Revelation 17:6
And I saw that the woman was drunk on the blood of God's holy people and on the blood of those [who were killed] witnessing about Jesus. And when I saw her I was greatly amazed.