Revelation 9:15

15Andκαὶwere releasedἐλύθησανtheοἱfourτέσσαρεςangelsἄγγελοιοἱhaving been preparedἡτοιμασμένοιforεἰςtheτὴνhourὥρανandκαὶdayἡμέρανandκαὶmonthμῆναandκαὶyearἐνιαυτόν,so thatἵναthey might killἀποκτείνωσινaτὸthirdτρίτοντῶνof mankindἀνθρώπων.

And the four angels having been prepared for the hour and day and month and year were released, so that they might kill a third of mankind.