36:9
وَجَعَلْنَا مِنۢ بَيْنِ أَيْدِيهِمْ سَدًّۭا وَمِنْ خَلْفِهِمْ سَدًّۭا فَأَغْشَيْنَٰهُمْ فَهُمْ لَا يُبْصِرُونَ
Wa ja'alnaa mim baini aydeehim saddanw-wa min khalfihim saddan fa aghshai naahum fahum laa yubsiroon
And We have put a bar in front of them and a bar behind them, and further, We have covered them up; so that they cannot see.