Revelation 9:15 Revelation 9:15 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. The work those four commanders were appointed by God to do, was to kill the third part of men in the Roman empire, who worshipped images, especially those idolaters, who had apostatised from the true worship of God. Which were prepared for an hour, and a day, and a month, and a year, which it taken prophetically, is three hundred and ninety years, and some odd time. Or else. thereby is signified some certain time appointed of God.