Revelation 16:11

The fourth poured out his bowl on the sun, and it was given to him to scorch men with fire.

People were scorched with great heat, and people blasphemed the name of God who has the power over these plagues. They didn’t repent and give him glory.

The fifth poured out his bowl on the throne of the beast, and his kingdom was darkened. They gnawed their tongues because of the pain,

The sixth poured out his bowl on the great river, the Euphrates. Its water was dried up, that the way might be prepared for the kings that come from the sunrise.

I saw coming out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three unclean spirits, something like frogs;

for they are spirits of demons, performing signs, which go out to the kings of the whole inhabited earth, to gather them together for the war of that great day of God the Almighty.