4:5-18 The fierce conqueror of the neighbouring nations was to make Judah desolate. The prophet was afflicted to see the people lulled into security by false prophets. The approach of the enemy is described. Some attention was paid in Jerusalem to outward reformation; but it was necessary that their hearts should be washed, in the exercise of true repentance and faith, from the love and pollution of sin. When lesser calamities do not rouse sinners and reform nations, sentence will be given against them. The Lord's voice declares that misery is approaching, especially against wicked professors of the gospel; when it overtakes them, it will be plainly seen that the fruit of wickedness is bitter, and the end is fatal.

15. For … from Dan—The connection is: There is danger in delay; for the voice of a messenger announces the approach of the Chaldean enemy from Dan, the northern frontier of Palestine (Jer 8:16; compare Jer 4:6; Jer 1:14).

Mount Ephraim—which borders closely on Judah; so that the foe is coming nearer and nearer. Dan and Beth-el in Ephraim were the two places where Jeroboam set up the idolatrous calves (1Ki 12:29); just retribution.