Jeremiah 4:9 - Matthew Poole's English Annotations on the Holy Bible

The heart of the king shall perish; the king, viz. of Judah, and the great men, that should have encouraged the people in such a calamitous day, and been their great support, shall not only be afraid, but their own hearts shall melt within them, they shall be even at their wits end; see Joshua 5:1; they shall have no heart at all to do any thing; they shall not be able to help their people, either by their counsel or arms; their courage will utterly fail, and their counsel perish. See Psalms 73:26. This was fulfilled in Zedekiah, Jer 39 Jer 42, whose flight would not advantage him. Shall be astonished; shall be in such a consternation, that they shall not know what course to take. The prophets, viz. false prophets, that had nothing but visions of peace for them, Ezekiel 13:16 Malachi 13:3,4 Jer 8:11. See Jeremiah 4:10. Shall wonder, not so much at the disappointment of their prophecies, for they knew well enough they were false, Jeremiah 23:26,27, as that they should be possessed with the same horror and frights with the rest, not knowing where to show, or rather to hide, their heads for the shame that would fall upon them; when their lies should be discovered, they would be put to shame, and perish with the rest, and whither shall they cause their shame to go.