Quran 25:70 from Surah Al-Furqaan on Divine Marvels.
إِلَّا مَن تَابَ وَءَامَنَ وَعَمِلَ عَمَلٗا صَٰلِحٗا فَأُوْلَٰٓئِكَ يُبَدِّلُ ٱللَّهُ سَيِّـَٔاتِهِمۡ حَسَنَٰتٖۗ وَكَانَ ٱللَّهُ غَفُورٗا رَّحِيمٗا
English translation: Except (he) who repents and believes and does righteous deeds righteous deeds then (for) those Allah will replace Allah will replace their evil deeds (with) good ones And is Allah Oft-Forgiving Most Merciful
Transliteration: illa man taba waamana wa'amila amalan salihan fa-ulaika yubaddilu al-lahu sayyiatihim hasanatin wakana al-lahu ghafuran rahiman