Revelation 14:18
And another angel came forth from the altar, having power over fire; and he called with a great cry to him having the sharp sickle, saying, Send thy sharp sickle, and harvest the grapes of the vineyard of the earth; for her grapes were fully ripe.
Joel 3:13
Send ye forth the sickle, for the harvest was ripened: come ye, go down, for the wine press was filled, the vats, overflowed; for their evil is great
Revelation 16:8
And the fourth angel poured out his vial upon the sun; and it was given him to parch up men with fire.
Revelation 6:9-10
And when he opened the fifth seal, I saw under the altar the souls of the slain for the word of God, and for the testimony which they had:
Revelation 14:15-16
And another angel went forth out of the temple, crying with a great voice to him sitting upon the cloud, Send thy sickle, and reap: for the hour has come to thee to reap; for the earth's harvest was dried up.