Moreover take thou unto thee an iron pan, and set it for a wall of iron between thee and the city: and set thy face against it, and it shall be besieged, and thou shalt lay siege against it. This shall be a sign to the house of Israel.
An iron pan - symbolically representing the divine decree as to the Chaldean army investing the city.
Set it for a wall of iron between thee and the city - Ezekiel, in the person of God, represents the wall of separation decreed to be between him and the people as one of iron, and the Chaldean investing army, His instrument of separating them from him, as one impossible to burst through.
Set thy face against it - inexorably (Psalms 34:16). The exiles envied their brethren remaining in Jerusalem; but exile is better than the straitness of a siege.