Sura al-Kahf 18:61

فَلَمَّا بَلَغَا مَجْمَعَ بَيْنِهِمَا نَسِيَا حُوتَهُمَا فَٱتَّخَذَ سَبِيلَهُۥ فِى ٱلْبَحْرِ سَرَبًا

fa-lammā balaghā majmaʿa baynihimā nasiya ḥūtahumā fa-attakhadha sabīlahu fī l-baḥri saraban

But when they reached the Junction, they forgot (about) their Fish, which took its course through the sea (straight) as in a tunnel.