“He released the two seas, meeting [side by side]; Between them is a barrier [so] neither of them transgresses. So which of the favours of your Lord would you deny?” Qur’an [55:19-21]
“And it is He who has released [simultaneously] the two seas, one fresh and sweet and one salty and bitter, and He placed between them a barrier and prohibiting partition.” Qur’an [25:53]