Revelation 9:14
It told the sixth angel who had the trumpet, "Release the four angels who are held at the great Euphrates River."
Revelation 16:12
The sixth angel poured his bowl on the great Euphrates River. Its water was dried up to prepare the way for the kings from the east.
Genesis 2:14
The third river is named the Tigris it flows to the east of Assyria. The fourth river is the Euphrates.
2 Samuel 8:3
David also attacked King Hadadezer, Rehob's son from Zobah, when he was attempting to restore his hegemony over the Euphrates River.
Jeremiah 51:63
When you finish reading this scroll, tie a rock around it and throw it into the middle of the Euphrates.
Revelation 7:1
After this, I saw four angels standing at the four corners of the earth. They were holding back the four winds of the earth so that no wind could blow on the land, on the sea, or on any tree.
Revelation 8:2
Then I saw the seven angels who stand in God's presence, and seven trumpets were given to them.
Revelation 8:6
The seven angels who had the seven trumpets got ready to blow them.
Revelation 9:15
So the four angels who were ready for that hour, day, month, and year were released to kill one-third of humanity.