Revelation 14:18
And another angel came out from the altar, who had power over fire; and he cried with a loud cry to him who had the sharp sickle, saying, Thrust in thy sharp sickle, and gather the clusters of the vine of the earth, for the grapes of the earth are fully ripe.
Revelation 16:8
And the fourth poured out his vial upon the sun; and it was given to it 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 them that were slain on account of the word of God, and on account of the testimony which they had borne;
Revelation 14:15-16
And another angel came out of the temple, crying with a loud voice to him who sat on the cloud, Thrust in thy sickle, and reap, for the time to reap is come, because the harvest of the earth is ripe.