Quran 29:7 from Surah Al-Ankaboot on Divine Marvels.
وَٱلَّذِينَ ءَامَنُواْ وَعَمِلُواْ ٱلصَّٰلِحَٰتِ لَنُكَفِّرَنَّ عَنۡهُمۡ سَيِّـَٔاتِهِمۡ وَلَنَجۡزِيَنَّهُمۡ أَحۡسَنَ ٱلَّذِي كَانُواْ يَعۡمَلُونَ
English translation: And those who believe and do righteous (deeds) surely We will remove from them their evil deeds and We will surely reward them (the) best (of) what they used (to) do
Transliteration: wa-alladhina amanu wa'amilu al-salihati lanukaffiranna anhum sayyiatihim walanajziyannahum ahsana alladhi kanu ya'maluna