Revelation 8:12,13 (KJV)
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 darkened, and the day shone not for a third part of it, and the night likewise.
13 And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!
The Fifth Angel Blows His Trumpet
God will seal a hundred and forty-four thousand Jews during the great tribulation. He will also be with them and protect them.