He did this while the army of the king of Babylon was attacking Jerusalem and the cities of Lachish and Azekah. He was attacking these cities because they were the only fortified cities of Judah which were still holding out. ¹ 

All the women who are left in the royal palace of Judah will be led out to the officers of the king of Babylon. They will taunt you saying, ¹  ‘Your trusted friends misled you; they have gotten the best of you. Now that your feet are stuck in the mud, they have turned their backs on you.’ ²