Revelation 8:13

And, in my vision, I heard an eagle flying in mid-heaven and crying in a loud voice--'Woe, woe, woe for all who live on the earth, at the other trumpet-blasts of the three angels who have yet to blow.'

Revelation 11:14

The second Woe has passed; and there is a third Woe soon to follow!

Revelation 9:12

The first Woe has passed; and still there are two Woes to follow!

Revelation 14:6

Then I saw another angel, flying in mid-heaven. He had the Good News, decreed from eternity, to announce to those who dwell on the earth--to men of every nation, and tribe, and language, and people;

Revelation 19:17

Then I saw an angel standing on the sun. He cried in a loud voice to all the birds that fly in mid-heaven-- 'Gather and come to the great feast of God,

Hebrews 1:14

Are not all the angels spirits in the service of God, sent out to minister for the sake of those who are destined to obtain Salvation?

Revelation 9:1

Then the fifth angel blew; and I saw a Star that had fallen upon the earth from the heavens, and to him was given the key of the bottomless pit.

Revelation 14:3

They are singing what seems to be a new song, before the throne, and before the four Creatures and the Councillors; and no one was able to learn that song except the hundred and forty-four thousand who had been redeemed from earth.

Treasury of Scripture Knowledge

Summary

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!

General references

Bible References

Flying

Revelation 14:3
They are singing what seems to be a new song, before the throne, and before the four Creatures and the Councillors; and no one was able to learn that song except the hundred and forty-four thousand who had been redeemed from earth.
Revelation 19:17
Then I saw an angel standing on the sun. He cried in a loud voice to all the birds that fly in mid-heaven-- 'Gather and come to the great feast of God,
Hebrews 1:14
Are not all the angels spirits in the service of God, sent out to minister for the sake of those who are destined to obtain Salvation?

General references

Revelation 11:14
The second Woe has passed; and there is a third Woe soon to follow!