Ezekiel 5:9
And I will do in thee that which I have not done, and whereunto I will not do any more the like, because of all thine abominations. And I will do in thee that which I have not done, and whereunto I will not do any more the like, because of all thine abominations.
Because of all its abominations, Jerusalem was to have done within it what had never been done before. The work was God's own doing against the city on account of those abominations. Nor would anything like it ever be done again, so complete and without parallel was the threatened judgment.