وَجَعَلْنَا مِنۢ بَيْنِ أَيْدِيهِمْ سَدًّا وَمِنْ خَلْفِهِمْ سَدًّا فَأَغْشَيْنَـٰهُمْ فَهُمْ لَا يُبْصِرُونَ
Wa ja'alnaa mim baini aydeehim saddanw-wa min khalfihim saddan fa aghshai naahum fahum laa yubsiroon
and set barriers before and behind them, blocking their vision: they cannot see.
And we have placed a barrier before them and a barrier behind them, and covered them over, so they cannot see.