Revelation 14:18
And another angel came out of the altar, having power over fire, and called with a loud cry to him that had the sharp sickle, saying, Send thy sharp sickle, and gather the bunches of the vine of the earth; for her grapes are fully ripened.
Joel 3:13
Put in the sickle, for the harvest is ripe: come, get you down, for the press is full, the vats overflow; for their wickedness is great.
Revelation 16:8
And the fourth poured out his bowl on the sun; and it was given to it to burn men with fire.
Revelation 6:9-10
And when it opened the fifth seal, I saw underneath 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, Send thy sickle and reap; for the hour of reaping is come, for the harvest of the earth is dried.