Surah Al-Munafiqoon Verse 3 - English Translation by Shabbir Ahmed
Surah Al-Munafiqoonذَٰلِكَ بِأَنَّهُمۡ ءَامَنُواْ ثُمَّ كَفَرُواْ فَطُبِعَ عَلَىٰ قُلُوبِهِمۡ فَهُمۡ لَا يَفۡقَهُونَ
This, because they profess (before you) that they have believed whereas afterward (among their folk) they reject the Truth. And so a seal has been set upon their hearts, thus they understand not. (Variation between utterance and action hampers the power of reasoning within human psyche)