لَا إِلَهَ إِلَّا أَنْتَ سُبْحَانَكَ إِنِّي كُنْتُ مِنَ الظَّالِمِينَ
Transliteration
La ilaha illa anta subhanaka inni kuntu minaz-zalimin
English meaning
There is no deity except You; exalted are You. Indeed, I have been of the wrongdoers.
When is it recited?
For deliverance from distress.
Its virtue
Whoever recites this dua, Allah relieves his distress.
Source
Al-Anbiya 21/87 — Jonah's supplication