Du'a of Prophet Yunus عليه السلام
الفئة: Forgiveness
لَا إِلَٰهَ إِلَّا أَنْتَ سُبْحَانَكَ إِنِّي كُنْتُ مِنَ الظَّالِمِينَ
Laa ilaaha illaa Anta, Subhaanaka innee kuntu minaz-zaalimeen.
There is no deity except You; exalted are You. Indeed, I have been of the wrongdoers., Saheeh International (en)
Quran 21:87
Jami` at-Tirmidhi 3505
The du'a of Prophet Yunus (Jonah) from the belly of the whale. Effective for any difficulty.
No Muslim man supplicates with it for anything, ever, except that Allah responds to him.