Albert Barnes Commentary Ezekiel 12:6

"In their sight shalt thou bear it upon thy shoulder, and carry it forth in the dark; thou shalt cover thy face, that thou see not the land: for I have set thee for a sign unto the house of Israel." — Ezekiel 12:6 (ASV)

You shall cover your face - A sign of mourning ; also of Zedekiah’s blindness (Ezekiel 12:12).