9وَجَعَلنا مِن بَينِ أَيديهِم سَدًّا وَمِن خَلفِهِم سَدًّا فَأَغشَيناهُم فَهُم لا يُبصِرونَMir Aneesuddinand We have made a barrier before them and a barrier behind them, then We have covered them, therefore they are not able to see.