Joel 2:1

1 Let the horn be sounded in Zion, and a war-cry in my holy mountain; let all the people of the land be troubled: for the day of the Lord is coming;

Joel 2:1 Meaning and Commentary

Joel 2:1

Blow ye the trumpet in Zion, and sound an alarm in my holy
mountain
This is spoken to the priests, whose business it was to blow the trumpets for calling solemn assemblies to meet in Zion, the temple built there, called from thence the holy mountain of God. Here the trumpet is ordered to be blown with a broken quivering voice, a tarantantara, to give notice of approaching danger by the locusts, or those enemies signified by them, and to prepare for it, and return to God by repentance; let all the inhabitants of the land tremble;
at the judgments of God coming upon them, and the alarm of them: for the day of the Lord cometh, for [it is] nigh at hand;
the time fixed by him to punish a wicked people, and to pour out his wrath and vengeance on them; the day of his visitation, not in love, but in anger.

Joel 2:1 In-Context

1 Let the horn be sounded in Zion, and a war-cry in my holy mountain; let all the people of the land be troubled: for the day of the Lord is coming;

2 For a day of dark and deep shade is near, a day of cloud and black night: like a black cloud a great and strong people is covering the mountains; there has never been any like them and will not be after them again, from generation to generation.

3 Before them fire sends destruction, and after them flame is burning: the land is like the garden of Eden before them, and after them an unpeopled waste; truly, nothing has been kept safe from them.

4 Their form is like the form of horses, and they are running like war-horses.

5 Like the sound of war-carriages they go jumping on the tops of the mountains; like the noise of a flame of fire burning up the grain-stems, like a strong people lined up for the fight.