Revelation 6:9
And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:
Revelation 8:1
And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.
Revelation 9:5
And to them it was given that they should not kill them, but that they should be tormented five months: and their torment was as the torment of a scorpion, when he striketh a man.