Surah Al-Anbiya
وَذَا ٱلنُّونِ إِذ ذَّهَبَ مُغَـٰضِبًا فَظَنَّ أَن لَّن نَّقْدِرَ عَلَيْهِ فَنَادَىٰ فِى ٱلظُّلُمَـٰتِ أَن لَّآ إِلَـٰهَ إِلَّآ أَنتَ سُبْحَـٰنَكَ إِنِّى كُنتُ مِنَ ٱلظَّـٰلِمِينَ
Wa żan-nūni iż żahaba mugāḍiban fa ẓanna allan naqdira ‘alaihi fa nādā fiẓ-ẓulumāti allā ilāha illā anta subḥānaka innī kuntu minaẓ-ẓālimīn(a).
And [mention] the man of the fish, when he went off in anger and thought that We would not decree [anything] upon him. And he called out within the darknesses, "There is no deity except You; exalted are You. Indeed, I have been of the wrongdoers."
📝 Footnotes
493) It refers to the darkness of the fish's belly, the darkness of the deep sea, and the darkness of the night.