﴿ بَيْنَهُمَا بَرْزَخٌۭ لَّا يَبْغِيَانِ ﴾

“[yet] between them is a barrier which they may not transgress.”

(There is a barrier) from Allah (between them) between the sweet and salty seas. (They encroach not (one upon the other)) nor does any one of them change the taste of the other.