9وَجَعَلنا مِن بَينِ أَيديهِم سَدًّا وَمِن خَلفِهِم سَدًّا فَأَغشَيناهُم فَهُم لا يُبصِرونَ(Irfan-ul-Quran)And We have set a wall before them and a wall behind them, and We have cast a veil over their eyes so they do not see anything.