Jeremiah 21:11-14
"And concerning the house of the king of Judah, say, 'Hear the word of the Lord, O house of David! Thus says the Lord:
"Execute judgment in the morning; and deliver him who is plundered out of the hand of the oppressor lest My fury go forth like fire and burn so that no one can quench it, because of the evil of your doings.
Behold, I am against you, O inhabitants of the valley, and rock of the plains" says the Lord, "who say 'who shall come down against us? Or who shall enter our dwellings?'
But I shall punish you according to the fruit of your doings," says the Lord;
"I will kindle a fire in its forest, and it shall devour all things around it."'"
When Pashur, sent by King Zedekiah, went to Jeremiah looking for words of hope from God, he certainly didn't expect the words he received and told to take back to the king.
For years and years Jeremiah had prophesied the penalties for worshipping idols, sacrificing children, and disobeying the Law. Now they are realizing the truth in what he said.