15 And the four angels were released, they who were prepared for an hour, and for a day, and for a month, and for a year, to kill the third (part) of men.
Revelation 9:15 Cross References - Etheridge
Revelation 8:7
7 And the First sounded. And there was hail, and fire mingled with the waters, and they were cast upon the earth; and the third of the earth burned, and the third of the trees burned, and every green herb burned.
Revelation 8:9
9 And the third of all creatures which were in the sea, which had lives, died, and the third of the ships were destroyed.
Revelation 8:11-12
11 And the name of the star is called Aphsinthos; and the third of the waters became bitterness, and many men died from the waters because they were bitter.
12 And the Fourth angel sounded. And the third of the sun was absorbed,[-] and the third of the moon, and the third of the stars, as that the third of them should be darkened; and they were darkened, and the day shone not a third of it, and the night, in like manner.
Revelation 9:5
5 And it was given them, that they should not kill them, but torture them five months. And their torture was as the torture of a scorpion when he striketh a man.
Revelation 9:10
10 And they had tails like those of scorpions, and stings; and in their tails they have power to hurt men five months.
Revelation 9:18
18 And by these three plagues were the third of men killed; from the fire, and from the smoke, and from the sulphur which went out of their mouths.