Revelation 9:15

Overview - Revelation 9
1	At the sounding of the fifth angel, a star falls from heaven, to whom is given the key to the bottomless pit.
2	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.

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.