What does Jeremiah 21:7 mean?

After that, I'll hand over Zedekiah, his officials, and everyone left in the city—those who survive the plague, sword, and famine—to Nebuchadnezzar, king of Babylon, and his army. He'll kill them without mercy or pity. Jeremiah 21:7 - Modern Text Bible

(God says that after the disasters, the survivors will be handed over to the Babylonians, who will show no compassion.)