إِنَّمَا ٱلتَّوۡبَةُ عَلَى ٱللَّهِ لِلَّذِينَ يَعۡمَلُونَ ٱلسُّوٓءَ بِجَهَٰلَةٖ ثُمَّ يَتُوبُونَ مِن قَرِيبٖ فَأُوْلَٰٓئِكَ يَتُوبُ ٱللَّهُ عَلَيۡهِمۡۗ وَكَانَ ٱللَّهُ عَلِيمًا حَكِيمٗا ١٧
Innamat-tawbatu 'alallāhi lilladhīna ya'malūnas-sū'a bijahālatin thumma yatūbūna min qarībin fa ulā'ika yatūbullāhu 'alayhim wakānallāhu 'alīman hakīmā
The repentance accepted by Allāh is only for those who do wrong in ignorance [or carelessness] and then repent soon [after].172 It is those to whom Allāh will turn in forgiveness, and Allāh is ever Knowing and Wise.
Footnotes
172 Scholars have also interpreted "soon" to mean before death.