Matthew Poole and continuators on Jeremiah 5:12

12 They have belied the LORD, and said, It is not he, neither shall evil come upon us; neither shall we see sword nor famine.

This may signifie 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 Gods words, or God did not say so, he gave 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.

Isa. 28.15.

This Siege or Famine, or any other such dreadful judgments, as Ieremiah speaks of, shall not befall us, seeing is used here for feeling, as it is in Iob 7.7.