Joel 2:1-7 RSV

1 Blow the trumpet in Zion; sound the alarm on my holy mountain! Let all the inhabitants of the land tremble, for the day of the LORD is coming, it is near,
2 a day of darkness and gloom, a day of clouds and thick darkness! Like blackness there is spread upon the mountains a great and powerful people; their like has never been from of old, nor will be again after them through the years of all generations.
3 Fire devours before them, and behind them a flame burns. The land is like the garden of Eden before them, but after them a desolate wilderness, and nothing escapes them.
4 Their appearance is like the appearance of horses, and like war horses they run.
5 As with the rumbling of chariots, they leap on the tops of the mountains, like the crackling of a flame of fire devouring the stubble, like a powerful army drawn up for battle.
6 Before them peoples are in anguish, all faces grow pale.
7 Like warriors they charge, like soldiers they scale the wall. They march each on his way, they do not swerve from their paths.