And We have set before them a barrier read saddan or suddan in both instances and behind them a barrier; so We have covered them so they do not see — this is also figurative depicting the way in which the paths of faith are closed to them.
- 36:99
وَجَعَلْنَا مِنْ بَيْنِ أَيْدِيهِمْ سَدًّا وَمِنْ خَلْفِهِمْ سَدًّا فَأَغْشَيْنَاهُمْ فَهُمْ لَا يُبْصِرُونَ
And We shall raise a barrier in front of them and a barrier behind them, and cover them over so that they will not be able to see.
- common.revelation-Meccan
- common.hizb : 176