Joel 2:1-3

Blow the trumpet; sound the alarm on Zion, God's sacred hill. Tremble, people of Judah! The day of the LORD is coming soon. It will be a dark and gloomy day, a black and cloudy day. The great army of locusts advances like darkness spreading over the mountains. There has never been anything like it, and there never will be again. Like fire they eat up the plants. In front of them the land is like the Garden of Eden, but behind them it is a barren desert. Nothing escapes them.