Revelation 14:18
and another angel came out from the altar, who had power over fire, and cried with a loud voice to him who had the sharp sickle, saying, Send your sharp sickle and gather the grapes of the vine of the earth, for its grapes are ripe.
Revelation 16:8
And the fourth poured out his bowl on the sun, and it was given it to scorch men with fire.
Revelation 6:9-10
And when he opened the fifth seal, I saw under the altar the souls of those killed for the word of God and for the testimony which they had.
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 your sickle and reap, for the time has come to harvest, for the harvest of the earth is dry.