Not graded
Hisn al-Muslim (Fortress of the Muslim) 124
((لاَ إِلَهَ إِلاَّ أَنْتَ سُبْحَانَكَ إِنِّي كُنْتُ مِنَ الظّالِمِينَ)).
(None has the right to be worshipped except You. How perfect You are, verily I was among the wrong-doers.)
Cited in Hisn al-Muslim (Fortress of the Muslim) (No. 124).