Surah Al-'Ankabut 29:7

وَٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّـٰلِحَـٰتِ لَنُكَفِّرَنَّ عَنْهُمْ سَيِّـَٔاتِهِمْ وَلَنَجْزِيَنَّهُمْ أَحْسَنَ ٱلَّذِى كَانُوا۟ يَعْمَلُونَ

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.

Translation: Saheeh International

Tafsir

And those who believe and perform righteous deeds We will surely absolve them of their misdeeds by their performance of righteous deeds and We will indeed requite them with the best of what they used to do namely their righteous deeds it ahsana is in the accusative because the operator of the oblique bi has been …

Excerpt from Tafsir al-Jalalayn, commentary on 29:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.