Joel predicts that God will punish all nations in the valley of Jehoshaphat.
From 2 Chronicles 20:1–37 we can see that at the final reckoning of the world, God’s people have nothing to do but to trust in God’s justice and power and to honour him jubilantly.
2 I will gather all the nations and bring them down to the Valley of Jehoshaphat. And I will enter into judgment with them there, on behalf of my people and my heritage Israel, because they have scattered them among the nations and have divided up my land,