ذَلِكَ وَمَنْ عَاقَبَ بِمِثْلِ مَا عُوقِبَ بِهِ ثُمَّ بُغِيَ عَلَيْهِ لَيَنصُرَنَّهُ اللَّهُ إِنَّ اللَّهَ لَعَفُوٌّ غَفُورٌ
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سورة الحج
(22/60) Just like this, and he who retaliates with the like of that with which he has been afflicted and then he has been oppressed, Allah most certainly helps him. Verily Allah indeed is Oft- Pardoning, Oft-Forgiving (the One that converts sins into merits).
Surah Al-Hajj