لِيُكَفِّرَ اللَّهُ عَنْهُمْ أَسْوَأَ الَّذِي عَمِلُوا وَيَجْزِيَهُمْ أَجْرَهُم بِأَحْسَنِ الَّذِي كَانُوا يَعْمَلُونَ
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سورة الزمر
(39/35) Allah covers even the worst of what they did (their sins) and gives them their reward for the best of what they have done (changes their evil deeds into merits).
Surah Az-Zumar