When they came to Marah, they could not drink the waters of Marah, because they were bitter; for that reason it was named Marah. So the people grumbled at Moses, saying, “What are we to drink?” Then he cried out to the LORD, and the LORD showed him a tree; and he threw it into the waters, and the waters became sweet.
T here He made for them a statute and regulation, and there He tested them.