Quran Al-'Ankabut 29:7
وَٱلَّذِينَ ءَامَنُواْ وَعَمِلُواْ ٱلصَّٰلِحَٰتِ لَنُكَفِّرَنَّ عَنۡهُمۡ سَيِّـَٔاتِهِمۡ وَلَنَجۡزِيَنَّهُمۡ أَحۡسَنَ ٱلَّذِي كَانُواْ يَعۡمَلُونَ
Translation
And those who believe and do righteous deeds - We will surely remove from them their misdeeds and will surely reward them according to the best of what they used to do.