Revelation 9:14-16 (King James Version)
14
Saying to the sixth angel which had the trumpet, Loose the four angels which are bound in the great river Euphrates.
15
And the four angels were loosed , which were prepared for an hour,a and a day, and a month, and a year, for to slay the third part of men.
16
And the number of the army of the horsemen were two hundred thousand thousand: and I heard the number of them.
The King James Version is in the public domain. (King James Version)
Commentary Critical and Explanatory on the Whole Bible
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People's New Testament
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Scofield Reference Notes (1917 Edition)
Treasury Of Scripture Knowledge
Wesley's Explanatory Notes
a.
Revelation 9:15 - for an hour: or, at an hour