﴿ وَذَا ٱلنُّونِ إِذ ذَّهَبَ مُغَٰضِبًۭا فَظَنَّ أَن لَّن نَّقْدِرَ عَلَيْهِ فَنَادَىٰ فِى ٱلظُّلُمَٰتِ أَن لَّآ إِلَٰهَ إِلَّآ أَنتَ سُبْحَٰنَكَ إِنِّى كُنتُ مِنَ ٱلظَّٰلِمِينَ ﴾

“AND [remember] him of the great fish when he went off in wrath, thinking that We had no power over him! But then heeded out in the deep darkness [of his distress]: “There is no deity save Thee! Limit­less art Thou in Thy glory! Verily, I have done wrong!””

Please check ayah 21:88 for complete tafsir.