Surah Ash-Shams 91:9

قَدْ أَفْلَحَ مَن زَكَّىٰهَا

He has succeeded who purifies it,

Translation: Saheeh International

Tafsir

Successful indeed qad the lām of laqad ‘indeed’ has been omitted from it for the sake of brevity will be the one who purifies it purges it of sins

Excerpt from Tafsir al-Jalalayn, commentary on 91:9, via Quran.com. The reader has the full commentary and 9 more tafsirs.