An Nisa’ Ayah 18

وَلَيْسَتِ ٱلتَّوْبَةُ لِلَّذِينَ يَعْمَلُونَ ٱلسَّيِّـَٔـاتِ حَتَّىٰٓ إِذَا حَضَرَ أَحَدَهُمُ ٱلْمَوْتُ قَالَ إِنِّى تُبْتُ ٱلْـَٔـٰنَ وَلَا ٱلَّذِينَ يَمُوتُونَ وَهُمْ كُفَّارٌ‌ۚ أُوْلَـٰٓئِكَ أَعْتَدْنَا لَهُمْ عَذَابًا أَلِيمًا ١٨ However, repentance is not accepted from those who knowingly persist in sin until they start dying, and then cry, “Now I repent!” nor those who die as disbelievers. For them We have prepared a painful punishment.