البقرة
وَقَالُوا قُلُوبُنَا غُلْفٌ ۚ بَل لَّعَنَهُمُ اللَّهُ بِكُفْرِهِمْ فَقَلِيلًا مَّا يُؤْمِنُونَ 88
The Jews in their arrogance, claimed to have the whole wisdom and divine knowledge; but their claim was void of any truth and was rooted in their arrogance and blasphemy. QURÄN reveals their state of mind saying: ``They say our hearts is covered in the sheath and we don't follow what you mean.'' And indeed it was so, for God had cursed them for their arrogance and blasphemy, turning them away from HIS MERCY. The Jews of Medina stood firmly against the propagations and preachings of the prophet, rejecting his call and message severely. They; every now and then brought another excuse for their denial; such as our hearts are covered, and we don't understand what you mean, and such and such! Of course they said that their heart was covered as an ironical utterance and in mockery; but Allah confirmed their assertion that their hearts was really covered and sealed, because Allah had cursed them for their blasphemy. THE IGNORANT AND COVERED HEARTS