Joel 2:1-3

Blow the trumpet in Zion, And sound an alarm in My holy mountain! Let all the inhabitants of the land tremble; For the day of the LORD is coming, For it is at hand: A day of darkness and gloominess, A day of clouds and thick darkness, Like the morning clouds spread over the mountains. A people come, great and strong, The like of whom has never been; Nor will there ever be any such after them, Even for many successive generations. A fire devours before them, And behind them a flame burns; The land is like the Garden of Eden before them, And behind them a desolate wilderness; Surely nothing shall escape them.