18. Al-Kahf (The Cave)

Surah: 18   Aya: 61

61. Falamma balagha majmaAAa baynihima nasiya hootahuma faittakhatha sabeelahu fee albahri saraban
  

  Translation

61. But when they reached the junction of the two seas, they forgot their fish, and it took its way through the sea as in a tunnel.