This verse points out the place where the great assemblage of the heathen is to hold, and the final decision in answer to the prophet's prayer is to take place. Let the heathen he wakened, and come up to the valley of Jehoshaphat.
All the nations that have opposed the kingdom of God, as well as those hostile nations from round about Israel and Judah, in their more immediate neighbourhood; though these, no doubt, are primarily meant.
The expression, "be wakened," of this verse corresponds to "waken up" of Joel 3:9.