Exodus 15:22-25

New International Version - UK

The waters of Marah and Elim

²² Then Moses led Israel from the Red Sea and they went into the Desert of Shur. For three days they travelled in the desert without finding water. ²³ When they came to Marah, they could not drink its water because it was bitter. (That is why the place is called Marah.^[a]) ²⁴ So the people grumbled against Moses, saying, ‘What are we to drink?’

²⁵ Then Moses cried out to the Lord, and the Lord showed him a piece of wood. He threw it into the water, and the water became fit to drink.

There the Lord issued a ruling and instruction for them and put them to the test.