ذَلِكَ بِأَنَّهُمْ آمَنُوا ثُمَّ كَفَرُوا فَطُبِعَ عَلَى قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ
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سورة الـمنافقون
(63/3) This is because they have believed (they have reached Hidayet after wishing to reach Allah before death and rendered their spirits to Allah) then have disbelieved. Therefore top of their hearts is sealed. They can no longer understand (comprehend).
Surah Al-Munafiqun