Revelation 14:18
And another angel came out from the altar, who had authority over fire. And he spoke with a great cry to him who had the sharp sickle, saying, Thrust in your sharp sickle, and gather the clusters of the vine of the earth, for her grapes are fully ripe.
Joel 3:13
Put in the sickle, for the harvest is ripe. Come, come 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 onto the sun. And it was given to him to burn 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 held.
Revelation 14:15-16
And another angel came out of the temple, crying in a great voice to Him sitting on the cloud, Thrust in Your sickle and reap, for the time has come for You to reap, for the harvest of the earth was dried.