Quran 36:9 from Surah Yaseen on Divine Marvels.
وَجَعَلۡنَا مِنۢ بَيۡنِ أَيۡدِيهِمۡ سَدّٗا وَمِنۡ خَلۡفِهِمۡ سَدّٗا فَأَغۡشَيۡنَٰهُمۡ فَهُمۡ لَا يُبۡصِرُونَ
English translation: And We have made before them before them before them a barrier and behind them and behind them a barrier and We covered them so they (do) not see
Transliteration: waja'alna min bayni aydihim saddan wamin khalfihim saddan fa-aghshaynahum fahum la yub'siruna