Wherefore thus saith the LORD God of hosts, Because ye speak this word, behold, I will make my words in thy mouth fire, and this people wood, and it shall devour them. Because ye speak this word - Because ye thus treat my message, "I will make my words in thy mouth fire." They have said they are but air; but I will make them fire, and a fire too that shall devour them. And how this was to be done, and by whom, is mentioned in the next verse.
Related Commentaries of Jeremiah 5:14
Jeremiah 5:14
14 Wherefore thus saith the LORD God of hosts, Because ye speak this word, behold, I will make my words in thy mouth fire, and this people wood, and it shall devour them.