Joel 2:1-2

Priests, blow the trumpets in Zion. Give a warning on my holy mountain. Let everyone who lives in the land tremble with fear. The day of the LORD is coming. It is very near. That day will be dark and sad. It will be black and cloudy. A huge army of locusts is coming. They will spread across the mountains like the sun when it rises. There has never been an army like it. And there will never be another for all time to come.