Revelation 9:14
one saying to the sixth angel that had the trumpet, "Loose the four angels which are bound at the great river Euphrates."
Revelation 16:12
And the sixth poured his bowl upon the great river, the River Euphrates, and its water was dried up so as to make ready the way for the kings that come from the sunrising.
Revelation 7:1
After this I saw four angels, standing at the four corners of the earth, restraining the four winds from blowing on the earth, or on the sea, or on any tree.
Revelation 8:2
And I saw the seven angels who stand before God, and seven trumpets were given them.
Revelation 8:6
And the seven angels with the seven trumpets prepared to blow their trumpets.
Revelation 9:15
Then the four angels that were held in readiness for that hour and day and month and year, were let loose, to destroy a third of mankind.