Ar-Rahman, Chapter 55, Verse 19-25
"He has let loose the two seas (the salt and the fresh water) meeting together. (19) Between them is a barrier which none of them can transgress. (20) Then which of the Blessings of your Lord will you both (jinn and men) deny? (21) Out of them both come out pearl and coral. (22) Then which of the Blessings of your Lord will you both (jinn and men) deny? (23) And His are the ships going and coming in the seas, like mountains. (24) Then which of the Blessings of your Lord will you both (jinn and men) deny? (25) "

These rivers are situated near Cape Town, South Africa