Surah Al-Mu'minun 23:102

فَمَن ثَقُلَتْ مَوَٰزِينُهُۥ فَأُو۟لَـٰٓئِكَ هُمُ ٱلْمُفْلِحُونَ

And those whose scales are heavy [with good deeds] - it is they who are the successful.

Translation: Saheeh International

Tafsir

Then those whose scales are heavy with good deeds they are the successful the winners;

Excerpt from Tafsir al-Jalalayn, commentary on 23:102, via Quran.com. The reader has the full commentary and 9 more tafsirs.