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