سورة Ya-Sin 36:9

وَجَعَلْنَا مِنۢ بَيْنِ أَيْدِيهِمْ سَدًّۭا وَمِنْ خَلْفِهِمْ سَدًّۭا فَأَغْشَيْنَـٰهُمْ فَهُمْ لَا يُبْصِرُونَ ٩

and have placed a barrier before them and a barrier behind them and covered them ˹all˺ up, so they fail to see ˹the truth˺