Come, and let us devise devices - Let us form a conspiracy against him, accuse him of being a false prophet, and a contradicter of the words of God, for God has promised us protection, and he says we shall be destroyed, and that God will forsake his people.
Let us smite him with the tongue - On the tongue; so it should be rendered. Lying and false testimony are punished in the eastern countries, to the present day, by smiting the person on the mouth with a strong piece of leather like the sole of a shoe. Sometimes a bodkin is run through the tongue. Blasphemy, calumny, and cursing of parents, are usually punished in that way among the Chinese.
The Jews were only hardened by the foregoing prophecy, and determined to compass Jeremiah‘s death.
Let us devise devices - i. e., “deliberately frame a plot” for his ruin (see Jeremiah 18:11 note).
The law shall not perish - As the Law of Moses was imperishable, the people probably drew the conclusion that the Levitical priesthood must also endure forever, and therefore that Jeremiah‘s predictions of national ruin were blasphemous (compare Acts 6:13-14).
Let us smite him with the tongue - Their purpose was to carry a malicious report of what he had said to king Jehoiakim, and so stir up his anger against him.