Revelation 14:18
and another angel came out from the altar, having power over the fire; and he called with a great voice to the one having the sharp sickle, Send in thy sharp sickle, and reap the clusters of the vintage of the earth; because her grapes are fully ripe.
Revelation 16:8
And the fourth poured out his bowl upon the sun; and it was given unto him to scorch the people with fire.
Revelation 6:9-10
And when he opened the fifth seal, I saw beneath the altar the souls of those who had been slain on account of the word of God, and the testimony which they had.
Revelation 14:15-16
And another angel came out of the temple, crying with a great voice to the one sitting on the cloud, Send forth your sickle, and reap: because the hour of reaping has come; because the harvest of the earth is fully ripe.