Jeremiah 5:12 - Matthew Poole's English Annotations on the Holy Bible

They have belied the Lord: this may signify either a denying, viz. a renouncing, making little or nothing of him, as some; or a denying, i.e. not believing, that these words of the prophet were God's words, or God did not say so; he gave not the prophet, nor any other, any such commission; and possibly their atheism might grow to so high a degree as to deny his providence, power, and justice, &c.: so it agrees with the following words, It is not he, or, God did not speak as he meant; but he would only fright us, it shall not be thus. Neither shall we see sword nor famine this siege or famine, or any other such dreadful judgments, as Jeremiah speaks of, shall not befall us. Seeing is used here for feeling, as it is in Job 7:7.