Not graded
Hisn al-Muslim (Fortress of the Muslim) 14
(اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ)
(O Allah, make me of those who return to You often in repentance and make me of those who remain clean and pure.)
Cited in Hisn al-Muslim (Fortress of the Muslim) (No. 14).