لَا إِلَهَ إِلَّا أَنْتَ سُبْحَانَكَ إِنِّي كُنْتُ مِنَ الظَّالِمِيْنَ

Laa 'ilaaha 'illaa 'Anta sub’haanaka 'innee kuntu minadh-dhaalimeen

There is none worthy of worship but You, glory is to You. Surely, I was among the wrongdoers. Sa'd ibn Abi Waqqas (RA) said, the Messenger of Allah (ﷺ) said, “The supplication of Dhun-Nun (Prophet Yunus As) when he supplicated, while in the belly of the whale was: (The Dua is mentioned above)’ So indeed, no Muslim man supplicates with it for anything, ever, except Allah responds to him.”

Reference: Sahih. Tirmidhi: 3505