This was a stop for the now freed Israelites who had just witnessedthe parting of the Red Sea, their passage safely through it, andthe destruction of Pharaoh's army and chario…ts. There are bitter orunfit to drink watering holes around the world (generally becausethe water flows over or through alkaline materials, which mayanswer the question to the extent you care right there) and theBible tells us the name Marah means bitter so it was a known placeas the quality of the water was too. See this verse: Exodus 15:22-23 New International Version (NIV) .
The Waters of Marah and Elim .
22 Then Moses led Israel from theRed Sea and they went into the Desert of Shur. For three days theytraveled in the desert without finding water. 23 When they came to Marah, they could not drinkits water because it was bitter. (That is why the place is calledMarah. [ a ] ) Footnotes: .
Exodus 15:23 Marah means bitter. God does not act in vain so His bringing the Israelites to thisspot served His purpose. Soon the peoples began to murmur againstMoses and God. So God once again displays His awesome power andprotection for His children by making the water drinkable. Soonthereafter, the people would continue on complaining about no food,so God would send manna from heaven to teach them about the Sabbathrest captivity caused them to forget. Yet, from their freedomonwards, the people continued to complain and do things their ways- the way of man. See related link below:. ( Full Answer )