What does Jeremiah 19:3 mean?

Say, 'Listen to the Lord's word, you kings of Judah and people of Jerusalem. The Lord of Armies, the God of Israel, says: I'm about to bring a disaster on this place that will shock everyone who hears about it.' Jeremiah 19:3 - Modern Text Bible

(God is warning the leaders and people that something terrible is coming because of their actions.)