Laa 'ilaaha 'illaa 'Anta subhaanaka 'innee kuntu minadh-dhaalimeen
There is none worthy of worship but You, glory is to You. Surely, I was among the wrongdoers.
Surah Al-Anbiya - 21:87
https://www.alim.org/duas/masnoon-duas/everyday-duas/
This powerful dua, recited by Prophet Yunus (AS) while in the belly of the whale, is a beautiful invocation for seeking Allah’s mercy and forgiveness. It reminds us of the importance of acknowledging our mistakes and turning to Allah in repentance.