وَلَيْسَتِ التَّوْبَةُ لِلَّذِينَ يَعْمَلُونَ السَّيِّئَاتِ حَتَّى إِذَا حَضَرَ أَحَدَهُمُ الْمَوْتُ قَالَ إِنِّي تُبْتُ الآنَ وَلاَ الَّذِينَ يَمُوتُونَ وَهُمْ كُفَّارٌ أُوْلَئِكَ أَعْتَدْنَا لَهُمْ عَذَابًا أَلِيمًا
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سورة النساء
(4/18) And repentance is not for those who go on doing evil deeds until, when death comes to one of them, he says: “Surely now I repent”; nor for those who die while they are unbelievers. For them We have prepared a painful torment.
Surah An-Nisa