اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ
Allahummaj'alni minat-tawwabina waj'alni minal-mutatahhirin
O Allah, make me among those who repent and make me among those who purify themselves.
Said after wudu, but also appropriate after prayer. Two categories of people: the tawwabin (those who constantly return to Allah in repentance) and the mutatahhirin (those who constantly purify themselves — both physically and spiritually). These are ongoing states, not one-time achievements. You do not repent once; you become a person who repents. The du'a asks for identity transformation, not just forgiveness.
Related Du'as
اللَّهُمَّ لَا مَانِعَ لِمَا أَعْطَيْتَ وَلَا مُعْطِيَ لِمَا مَنَعْتَ وَلَا يَنْفَعُ ذَا الْجَدِّ مِنْكَ الْجَدُّ
O Allah, none can withhold what You give, and none can give what You withhold, and no wealth or might can benefit anyone against Your will.
Sahihاللَّهُ لَا إِلَٰهَ إِلَّا هُوَ الْحَيُّ الْقَيُّومُ ۚ لَا تَأْخُذُهُ سِنَةٌ وَلَا نَوْمٌ ۚ لَهُ مَا فِي السَّمَاوَاتِ وَمَا فِي الْأَرْضِ ۗ مَن ذَا الَّذِي يَشْفَعُ عِندَهُ إِلَّا بِإِذْنِهِ ۚ يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ ۖ وَلَا يُحِيطُونَ بِشَيْءٍ مِّنْ عِلْمِهِ إِلَّا بِمَا شَاءَ ۚ وَسِعَ كُرْسِيُّهُ السَّمَاوَاتِ وَالْأَرْضَ ۖ وَلَا يَئُودُهُ حِفْظُهُمَا ۚ وَهُوَ الْعَلِيُّ الْعَظِيمُ
Allah! There is no deity except Him, the Ever-Living, the Sustainer of existence. Neither drowsiness overtakes Him nor sleep. To Him belongs whatever is in the heavens and whatever is on the earth. Who can intercede with Him except by His permission? He knows what is before them and what will be after them, and they encompass not a thing of His knowledge except for what He wills. His Kursi extends over the heavens and the earth, and their preservation tires Him not. And He is the Most High, the Most Great.
Sahihاللَّهُمَّ إِنِّي أَسْأَلُكَ الْفِرْدَوْسَ الْأَعْلَى مِنَ الْجَنَّةِ، فَإِنَّهُ أَعْلَى الْجَنَّةِ وَأَوْسَطُهَا وَمِنْهُ تَفَجَّرُ أَنْهَارُ الْجَنَّةِ وَفَوْقَهُ عَرْشُ الرَّحْمَنِ
O Allah, I ask You for Al-Firdaws, the highest level of Paradise, for it is the highest of Paradise, its center, and from it the rivers of Paradise spring forth, and above it is the Throne of the Most Merciful.
Sahihاللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْجُبْنِ وَأَعُوذُ بِكَ مِنَ الْبُخْلِ وَأَعُوذُ بِكَ مِنْ أَنْ أُرَدَّ إِلَى أَرْذَلِ الْعُمُرِ وَأَعُوذُ بِكَ مِنْ فِتْنَةِ الدُّنْيَا وَعَذَابِ الْقَبْرِ
O Allah, I seek refuge in You from cowardice, from miserliness, from being returned to the most decrepit old age, and I seek refuge in You from the trials of this world and the punishment of the grave.
Sahih