And We have put before them a barrier and behind them a barrier and covered them, so they do not see.
The Saheeh International Quran Translation
وَجَعَلْنَا مِنۢ بَيْنِ أَيْدِيهِمْ سَدًّا وَمِنْ خَلْفِهِمْ سَدًّا فَأَغْشَيْنَٰهُمْ فَهُمْ لَا يُبْصِرُونَAnd We have put before them a barrier and behind them a barrier and covered them, so they do not see.