Woe to the city of oppressors, rebellious and defiled!
Purification is the removal of something that does not belong and here we see the sin that does not belong in the city of Jerusalem. We see that God's people had become polluted by the ways of the world and have ignored the poor among them. In our world today, it seems that everyone (even Christians) are out to get all that they can and to store up wealth for themselves. This is often accomplished on the backs of the poor and that is why the city is called "the city of oppressors".