Joel 2:1-2

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 Yahweh comes, for it is close at hand: A day of darkness and gloominess, a day of clouds and thick darkness. As the dawn spreading on the mountains, a great and strong people; there has never been the like, neither will there be any more after them, even to the years of many generations.