All the officials of Judah and Jerusalem, along with the eunuchs and the priests, would be handed over to their enemies, who wanted to kill them. The same goes true also for all the people who were part of that agreement to free the Hebrew slaves, when they passed through the 2 parts of the calf. Thus they would all die. Their dead bodies would become the food for the birds of the air or the wild animals of the earth.
The people of Jerusalem had not obeyed Yahweh about freeing up their Hebrew slaves. Now Yahweh was going to free them to the sword, pestilence, and famine, the common formula of Jeremiah for destruction. They would become a horror for all the countries in the world. They had broken their covenant with Yahweh. They had not kept the terms of the covenant agreement, since they had re-enslaved the freed Hebrew slaves in Jerusalem. The ancient practice of cutting or sacrificing an animal into two pieces was a way of ratifying an agreement, as can be seen in Genesis, chapter 15. Then the two people would walk between the two pieces of the calf to indicate that if they broke the agreement, they too would be killed. Thus these disobedient ones who broke the covenant were subject to death, just as the calf had been killed and cut up.