Revelation 9:15

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 9:15  (King James Version)
And the four angels were loosed, which were prepared for an hour, and a day, and a month, and a year, for to slay the third part of men.

or, at. an hour.
Revelation 9:5 Revelation 9:10

for to
18 ; Revelation 8:7 Revelation 8:9 Revelation 8:11 Revelation 8:12