Joel 2:1-2

Blow the trumpet in Zion, wail on my holy mountain, let all the inhabitants of the land be stirred up. For the day of the Lord is on its way; for it is near: a day of darkness and gloom, a day of clouds and whirlwinds. Like the morning reaching over the mountains, they are a numerous and strong people. Nothing like them has existed since the beginning, nor will exist after them, even in the years of generation upon generation.