36:9
وَجَعَلْنَا مِنۢ بَيْنِ أَيْدِيهِمْ سَدًّا وَمِنْ خَلْفِهِمْ سَدًّا فَأَغْشَيْنَـٰهُمْ فَهُمْ لَا يُبْصِرُونَ
wajaʿalnā min bayni aydīhim saddan wamin khalfihim saddan fa-aghshaynāhum fahum lā yub'ṣirūna
and set barriers before and behind them, blocking their vision: they cannot see.
And We have put a barrier before them, and a barrier behind them, and We have covered them up, so that they cannot see.