إِنَّ الَّذِينَ كَفَرُواْ بَعْدَ إِيمَانِهِمْ ثُمَّ ازْدَادُواْ كُفْرًا لَّن تُقْبَلَ تَوْبَتُهُمْ وَأُوْلَئِكَ هُمُ الضَّآلُّونَ
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سورة آل عمران
(3/90) Surely, those who disbelieve after their believing, then increase in disbelief, their (those who fall into Misguidance for the third time) repentance will not be accepted and these are they who are in Misguidance.
Surah Al Imran