Revelation 14:18
Another angel came out from the altar, he who has power over fire, and he called with a great voice to him who had the sharp sickle, saying, "Send forth your sharp sickle, and gather the clusters of the vine of the earth, for the earth's grapes are fully ripe!"
Joel 3:13
Put in the sickle; for the harvest is ripe. Come, tread, for the winepress is full, the vats overflow, for their wickedness is great."
Revelation 16:8
The fourth poured out his bowl on the sun, and it was given to him to scorch men with fire.
Revelation 6:9-10
When he opened the fifth seal, I saw underneath the altar the souls of those who had been killed for the Word of God, and for the testimony of the Lamb which they had.
Revelation 14:15-16
Another angel came out from the temple, crying with a loud voice to him who sat on the cloud, "Send forth your sickle, and reap; for the hour to reap has come; for the harvest of the earth is ripe!"