Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:87:14 –

He has certainly succeeded who purifies himself  

Successful, winner, indeed is he who purifies himself, ˹who˺ cleanses himself by means of ˹his adherence to˺ faith,
القرآن:٨٧:١٤ –

قَدْ أَفْلَحَ مَنْ تَزَكَّىٰ  

{قد أفلح} فاز {من تزكى} تطهر بالإيمان.

See similar narrations below:

Collected by Qurʾān, Suyūṭī
quran:23:1 – In the name of Allah, the Entirely Merciful, the Especially Merciful.

Certainly will the believers have succeeded:  

Indeed (qad is for confirmation) prosperous, victorious, are the believers,
القرآن:٢٣:١ – بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ

قَدْ أَفْلَحَ الْمُؤْمِنُونَ  

{قد} للتحقيق {أفلح} فاز {المؤمنون}.
quran:91:9 –

He has succeeded who purifies it,  

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,
القرآن:٩١:٩ –

قَدْ أَفْلَحَ مَنْ زَكَّاهَا  

{قد أفلح} حذفت منه اللام لطول الكلام {مَنْ زكَّاها} طهرها من الذنوب.