“Hear this, O foolish and senseless people, who have eyes, but see not, who have ears, but hear not.
Declare ye then this; and what is it? Hear, O foolish people, etc. Here he first reproves the Jews and Israelites for their stupidity, because they were even without common sense; for the heart in Hebrew means the mind or understanding, as we have seen elsewhere. He then says, that this people were destitute of all understanding.
The prophet, having reproved them for sin and threatened the judgments of God against them, is here sent to them again upon another errand, which he must publish in Judah; the purport of it is to persuade them to fear God, which would be an effectual principle of their reformation, as the want of that fear had been at the bottom of their apostasy. I.
Commenting on Jeremiah 5:20-24
Hear now this, O foolish people, and without understanding,.... or, "heart" (a); See Gill on Jer 4:22, which have eyes, and see not; which have ears, and hear not; like the idols they served, Psa 115:4. this is an upbraiding of them with their folly and stupidity, their want of common sense, their blindness and ignorance; notwithstanding they had the means of light and knowledge, the law, and the prophets.