Quran 7:153 from Surah Al-A'raaf on Divine Marvels.
وَٱلَّذِينَ عَمِلُواْ ٱلسَّيِّـَٔاتِ ثُمَّ تَابُواْ مِنۢ بَعۡدِهَا وَءَامَنُوٓاْ إِنَّ رَبَّكَ مِنۢ بَعۡدِهَا لَغَفُورٞ رَّحِيمٞ
English translation: And those who do the evil deeds then repented from after that and believed indeed your Lord from after that (is) surely Oft-Forgiving Most Merciful
Transliteration: wa-alladhina amilu al-sayiati thumma tabu min ba'diha waamanu inna rabbaka min ba'diha laghafurun rahimun