Revelation 14:18
And another angel came out from the altar, who had power over fire, and cried with a loud cry to him that had the sharp sickle saying, Thrust in thy sharp sickle and gather the clusters of the earth; for her grapes are fully ripe.
Joel 3:13
Put in the sickle for the harvest is ripe; come, go down for the press is full, the vats overflow; for their wickedness is great.
Revelation 16:8
And the fourth angel poured out his vial against the sun; and it was given unto 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 those that had been slain because of 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 was seated on the cloud, Thrust in thy sickle and reap; for the hour is come for thee to reap; for the harvest of the earth is dry.