Joel 2:1-3

Blow the trumpet on Zion. Shout a warning on my holy mountain. Let all the people who live in the land shake with fear. The LORD’s special day is coming; it is near. It will be a dark, gloomy day. It will be a dark and cloudy day. At sunrise you will see the army spread over the mountains. It will be a great and powerful army. There has never been anything like it before, and there will never be anything like it again. The army will destroy the land like a burning fire. In front of them the land will be like the Garden of Eden. Behind them the land will be like an empty desert. Nothing will escape them.