Verses and Translation
قَدۡ أَفۡلَحَ مَن زَكَّٮٰهَا (٩)
“He has succeeded who purifies it”
Commentary
This could mean that whoever purifies himself by obedience to Allah, then he will be successful. This is as Qatadah said, “He cleanses it from the lowly and despicable characteristics.” [Ibn Kathir]
(The “it” in this verse is referring to the self. This is mentioned in verse 7 of the same chapter.)