Revelation 8:13
and the night likewise, And I saw and heard an angel flying in the midst of heaven, saying with a loud voice, Wo, wo, wo to the inhabitants of the earth, by reason of the other voices of the trumpets of the three angels who are yet to sound.
Revelation 11:14
The second wo is past: behold the third wo cometh quickly.
Revelation 9:12
One wo is past: behold there come yet two woes after this.
Revelation 14:6
And I saw another angel flying in the midst of heaven, having an everlasting gospel to preach to them that dwell on the earth, and to every nation,
Revelation 19:17
And I saw an angel standing in the sun; and he cried with a loud voice, saying to all the birds that fly in the midst of heaven, Come, and gather yourselves together to the great supper of God,
Hebrews 1:14
Are they not all ministring spirits, sent forth to serve for them who shall inherit salvation?
Revelation 9:1
And the fifth angel sounded, and I saw a star falling from heaven upon the earth, and to him was given the key of the bottomless pit.
Revelation 14:3
And they sing a new song before the throne, and before the four living creatures and the elders: and none could learn the song but the hundred forty-four thousand, who were redeemed from the earth.