once
اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ
Edition transliteration
Allahummaj-AAalnee minat-tawwabeena wajAAalnee minal-mutatahhireen.
Meaning
O Allah, make me of those who return to You often in repentance and make me of those who remain clean and pure.
Source and references
Hisn al-Muslim, entry 14.The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Fortress of the Muslim. Open source ↗