John Calvin Reformed @genevareformer

Here Jeremiah complains of the obstinate contempt of the people; he found them not only uncourteous but even petulant towards God, so that they hesitated not to discredit all prophecies, to despise the promises, and boldly to reject all threatenings. The Prophet had often threatened them; and when God delayed the time, they made a wrong use of his forbearance, as it is commonly the case with the reprobate.

Matthew Henry Presbyterian @wholebiblehenry

Here, as often before, we have the prophet retired for private meditation, and alone with God. Those ministers that would have comfort in their work must be much so. In his converse here with God and his own heart he takes the liberty which devout souls sometimes use in their soliloquies, to pass from one thing to another, without tying themselves too strictly to the laws of method and coherence.

Commenting on Jeremiah 17:12-18

John Gill Reformed Baptist @doctorgill

Behold, they say unto me,.... Or, "they are saying unto me" (y), continually; these were their daily flouts and jeers: Where is the word of the Lord? that thou hast so often talked of? thou hast for a long time threatened us with a siege, and famine, pestilence, and the sword, and captivity, but none of these come to pass; where is the accomplishment of them?