I have heard a rumour, &c.— The prophets frequently represent God as a mighty monarch, summoning nations, and sending them where he will, to execute his orders. See Isaiah 13:2; Isaiah 18:3. The Chaldeans are here referred to.
Related Commentaries of Jeremiah 49:14
Jeremiah 49:14
14 I have heard a rumour from the LORD, and an ambassador is sent unto the heathen, saying, Gather ye together, and come against her, and rise up to the battle.