Revelation 8:12-13 - The Fourth Trumpet
12 The fourth angel blew his trumpet. A third of the sun was struck. A third of the moon, and a third of the stars were darkened. The illumination of both day and night was cut by one third.
13 Then I saw and heard an angel flying in midheaven. He said with a loud voice: Woe, woe, woe to those dwelling on earth, because of the remaining blasts of the trumpet of the three angels who are about to sound!