Reference : Hisn al-Muslim 124

لَا إِلَهَ إِلَّا أنْـت سُـبْحانَكَ إِنِّي كُنْـتُ مِنَ الظّـالِميـن
Lā ilāha illā anta subḥānaka 
innī kuntu minaẓ-ẓālimīn.


There is none worthy of worship but You, glory is to You. 
Surely, I was among the wrongdoers.

Reference:
At-Tirmidhi 5/529. Al-Hakim declared it authentic and Ath-Thahabi agreed 
with him 1/ 505. See also Al-Albani, Sahih At-Tirmidhi 3/168.

Chapter: For one in distress