Success And Prosperity Linked to Tazkiyah (Purification) Of The Soul

Ash-Shams (91):9 [Ibn Katheer | Tabari | Qurtubi] Arabic
قَدْ أَفْلَحَ مَن زَكَّاهَا
Indeed he succeeds who purifies his ownself (i.e. obeys and performs all that Allâh ordered, by following the true Faith of Islâmic Monotheism and by doing righteous good deeds).
Ta-Ha (20):76 [Ibn Katheer | Tabari | Qurtubi] Arabic
جَنَّاتُ عَدْنٍ تَجْرِي مِن تَحْتِهَا الْأَنْهَارُ خَالِدِينَ فِيهَا وَذَلِكَ جَزَاء مَن تَزَكَّى
‘Adn (Edn) Paradise (everlasting Gardens), under which rivers flow, wherein they will abide forever: such is the reward of those who purify themselves [(by abstaining from all kinds of sins and evil deeds) which Allâh has forbidden and by doing all that which Allâh has ordained)].
Al-A’la (87):14 [Ibn Katheer | Tabari | Qurtubi] Arabic
قَدْأَفْلَحَ مَن تَزَكَّى
Indeed whosoever purifies himself (by avoiding polytheism and accepting Islâmic Monotheism) shall achieve success,
Al-Lail (92):18 [Ibn Katheer | Tabari | Qurtubi] Arabic
الَّذِي يُؤْتِي مَالَهُ يَتَزَكَّى
He who spends his wealth for increase in self-purification,
Fatir (35):18 [Ibn Katheer | Tabari | Qurtubi] Arabic
وَلَا تَزِرُ وَازِرَةٌ وِزْرَ أُخْرَى وَإِن تَدْعُ مُثْقَلَةٌ إِلَى حِمْلِهَا لَا يُحْمَلْ مِنْهُ شَيْءٌ وَلَوْ كَانَ ذَا قُرْبَى إِنَّمَا تُنذِرُ الَّذِينَ يَخْشَوْنَ رَبَّهُم بِالغَيْبِ وَأَقَامُوا الصَّلَاةَ وَمَن تَزَكَّى فَإِنَّمَا يَتَزَكَّى لِنَفْسِهِ وَإِلَى اللَّهِ الْمَصِيرُ
And no bearer of burdens shall bear another’s burden, and if one heavily laden calls another to (bear) his load, nothing of it will be lifted even though he be near of kin. You (O Muhammad (sallallaahu alayhi wasallam)) can warn only those who fear their Lord unseen, and perform As-Salât (Iqâmat­as­Salât). And he who purifies himself (from all kinds of sins), then he purifies only for the benefit of his ownself. And to Allâh is the (final) Return (of all).