18 Then another angel came out from the altar, the one who has power over fire, and he called with a loud voice to him who had the sharp sickle, "Put in your sharp sickle, and gather the clusters from the vine of the earth, because its grapes are ripe."
Revelation 14:18 Cross References - Common
Revelation 6:9-10
9 When he opened the fifth seal, I saw under the altar the souls of those who had been slain because of the word of God and the testimony they had maintained;
10 they cried out with a loud voice, "O Sovereign Lord, holy and true, how long before you judge and avenge our blood on those who dwell on the earth?"
Revelation 14:15-16
Revelation 16:8
8 The fourth angel poured out his bowl on the sun, and it was given to it to scorch men with fire.