Revelation 8:13
And I saw and heard one angel flying in the mid-heavens, saying with a loud voice, Wo, wo, wo, to the dwellers upon earth, because of the remaining blasts of the trumpet of the three angels, which are ready to sound.
Revelation 11:14
The second woe is past; behold the third woe is coming quickly.
Revelation 9:12
One woe is past; and, behold, there are coming yet two woes after these.
Revelation 14:6
And I saw another angel flying in the midst of heaven, having the everlasting gospel to preach the glad tidings to the inhabitants of the earth, to every nation, and tribe, and tongue, and people,
Revelation 19:17
And I saw an angel standing in the sun; and he cried with a loud voice, saying to all the fowls which fly in the midst of heaven, Come hither and flock together unto the supper of the great God:
Hebrews 1:14
Are they not all ministerial spirits, sent to perform service on account of those who are about to inherit salvation?
Revelation 9:1
AND the fifth angel sounded, and I saw a star fall from heaven to the earth; and to him was given the key of the pit of the abyss [of hell].
Revelation 14:3
and they sang as it were a new song before the throne, and before the four living beings, and the presbyters: and no person could learn that song, but the hundred forty-four thousand, who were redeemed from the earth.