4:18
وَلَيْسَتِٱلتَّوْبَةُلِلَّذِينَيَعْمَلُونَٱلسَّئَِّاتِحَتَّىٰٓإِذَاحَضَرَأَحَدَهُمُٱلْمَوْتُقَالَإِنِّىتُبْتُٱلَْٰٔنَوَلَاٱلَّذِينَيَمُوتُونَوَهُمْكُفَّارٌ ۚأُو۟لَٰٓئِكَأَعْتَدْنَالَهُمْعَذَابًاأَلِيمًا١٨
walaysati l-tawbatu lilladhīna yaʿmalūna l-sayiāti ḥattā idhā ḥaḍara aḥadahumu l-mawtu qāla innī tub'tu l-āna walā alladhīna yamūtūna wahum kuffārun ulāika aʿtadnā lahum ʿadhāban alīman
But repentance is not [accepted] of those who [continue to] do evil deeds up until, when death comes to one of them, he says, "Indeed, I have repented now," or of those who die while they are disbelievers. For them We have prepared a painful punishment.(18)