Ayah

وَٱلَّذِينَ ءَامَنُواْ وَعَمِلُواْ ٱلصَّٰلِحَٰتِ وَءَامَنُواْ بِمَا نُزِّلَ عَلَىٰ مُحَمَّدٍ وَهُوَ ٱلۡحَقُّ مِن رَّبِّهِمۡ ۙ كَفَّرَ عَنۡهُمۡ سَيِّـَٔاتِهِمۡ وَأَصۡلَحَ بَالَهُمۡ
Translation

But those who believe and work deeds of righteousness, and believe in the (Revelation) sent down to Muhammad - for it is the Truth from their Lord,- He will remove from them their ills and improve their condition.<br/>
Tafsir

But those who believe, namely, the Helpers (al-Ansaar) and others [like them], and perform righteous deeds and believe in what has been revealed to Muhammad, namely, Al-Qur'an - and it is the truth from their Lord - He will absolve them of, He will forgive them, their misdeeds and rightly dispose their mind, their state, so that they do not disobey Him.