Revelation 9:14

Overview - Revelation 9
At the sounding of the fifth angel, a star falls from heaven, to whom is given the key to the bottomless pit.
He opens the pit, and there come forth locusts like scorpions.
12 The first woe past.
13 The sixth trumpet sounds.
14 Four angels are let loose, that were bound.
Treasury of Scripture Knowledge

Revelation 9:14  (King James Version)
Saying to the sixth angel which had the trumpet, Loose the four angels which are bound in the great river Euphrates.

to the
Revelation 8:2 Revelation 8:6

15 ; 16:12

the great
Genesis 2:14 ; 2 Samuel 8:3 ; Jeremiah 51:63