Revelation 8:12-13 - The Fourth Trumpet
12 Then the fourth angel blew his trumpet, and one-third of the sun was cursed with a plague, and one-third of the moon, and one-third of the stars, so that one-third of them were darkened, and there was no light for one-third of the day and for one-third of the night.
13 Then I looked, and I heard an eagle flying in mid-air say in a loud voice, "Alas! Alas! Alas for the inhabitants of the earth because of the remaining blasts of the three angels who are going to blow their trumpets!"