Surah Al-Anfal (The Spoils of War), Verse 29

یٰۤاَیُّهَا الَّذِیْنَ اٰمَنُوْۤا اِنْ تَتَّقُوا اللّٰهَ یَجْعَلْ لَّكُمْ فُرْقَانًا وَّیُكَفِّرْ عَنْكُمْ سَیِّاٰتِكُمْ وَیَغْفِرْ لَكُمْ وَاللّٰهُ ذُو الْفَضْلِ الْعَظِیْمِ ۟

Yaaa aiyuhal lazeena aamanooo in tattaqul laaha yaj'al lakum furqaananw wa yukaffir 'ankum saiyi aatikum wa yaghfir lakum; wallaahu zul fadlil 'azeem

“O ye who believe! if ye fear Allah, He will grant you a criterion (to judge between right and wrong), remove from you (all) evil (that may afflict) you, and forgive you: for Allah is the Lord of grace unbounded.”

Quran 8:29 (Yusuf Ali Translation)