ثُمَّ إِنَّ رَبَّكَ لِلَّذِينَ عَمِلُواْ السُّوءَ بِجَهَالَةٍ ثُمَّ تَابُواْ مِن بَعْدِ ذَلِكَ وَأَصْلَحُواْ إِنَّ رَبَّكَ مِن بَعْدِهَا لَغَفُورٌ رَّحِيمٌ
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سورة النحل
(16/119) Then surely your Lord, with respect to those who do evil in ignorance and afterwards repent and improve (cleanse their souls), after that most surely is Oft-Forgiving, the Most Merciful (the One that sends the Glorious light of Mercy).
Surah An-Nahl