Revelation 14:18
And another angel that had power over fire, came out from the altar; and he cried with a loud cry to him that had the sharp sickle, and said: Thrust in your sharp sickle, and gather the clusters of the vine of the earth, for its grapes are fully ripe.
Revelation 16:8
And the fourth angel poured out his cup on the sun; and it was given to him to scorch men with fire.
Revelation 6:9-10
And when he had opened the fifth seal, I saw under the altar the souls of those who had been slain for the word of God, and for the testimony which they had borne:
Revelation 14:15-16
And another angel came out of the temple, and cried with a loud voice to him that sat on the cloud: Thrust in your sickle and reap, for the time has come for you to reap, for the harvest of the earth is fully ripe.