Dua of Yunus

لا إِلَهَ إِلَّا أَنتَ سُبْحَانَكَ إِنِّي كُنتُ مِنَ الظَّالِمِينَ
...none has the right to be worshipped but You (O Allâh)], Glorified (and Exalted) are You [above all that (evil) they associate with You]. Truly, I have been of the wrong-doers." (Al-Anbiya 21:87)

The Prophet صلى الله عليه وسلم said in the hadith recorded by At-Tirmithi and others:The invocation of my brother Dhu-n-Nun, "None has the right to be worshipped save You;glory be to You, far removed are You from any imperfection; I have been amongst the wrong-doers," none who is experiencing difficulty employs it except that Allah Subhana wa Ta'ala would relieve him of his difficulty.