Error in the Qur’an
He is the one who has set free two bodies of flowing water, one palpable and sweet and the other salt and bitter; Yet has he made a partition between them, A partition that is forbidden to be passed.~ Qur’an (born:610 AD age:1405) Surah Al Furqan 25:53
Mohammed would not have had much experience with flowing water. This is simply false. When rivers meet, especially when one is muddier than the other, you can easily see it takes a while for them to merge. There is no partition. Taste the water near a river mouth. It changes gradually from fresh to salty as you move from the mouth. That is how ancient sailors knew they were getting near land.