These four angels had been prepared for the hour, the day, the month, and the year.
In preparation for the precise moment when Christ wished their release, he had earlier ordained their binding at this River. Now that the moment has arrived, the angel who blew the sixth trumpet released these four angels.
15 Et les quatre anges qui étaient prêts pour l'heure, le jour, le mois et l'année, furent déliés afin qu'ils tuent le tiers des hommes.