Commentaries:
Jamieson, Fausset, and Brown
The prophet in vision seeing the immense array of nations congregating, exclaims, "Multitudes, multitudes!" a Hebraism for immense multitudes.
valley of decision—that is, the valley in which they are to meet their "determined doom." The same as "the valley of Jehoshaphat," that is, "the valley of judgment" (see on Joel 3:2). Compare Joel 3:12, "there will I sit to judge," which confirms English Version rather than Margin, "threshing." The repetition of "valley of decision" heightens the effect and pronounces the awful certainty of their doom.
Other Jamieson, Fausset, and Brown entries containing Joel 3:14:
Obadiah 1:15
Zechariah 14:1
Zechariah 14:4
Revelation 16:16
Revelation 19:20
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