Revelation 8:12-13 - The Fourth Trumpet
12 And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so as the third part of them was darkned, and the day lost a third part of its light, and the night likewise.
13 then I beheld, and heard an eagle flying thro' the midst of heaven, saying with a loud voice, wo, wo, wo to the inhabitants of the earth, by reason of the sound of the trumpets which the other three angels are yet to sound.