Exodus 15:23 in the King James Version
And when they came to Marah, they could not drink of the waters of Marah, for they were bitter: therefore the name of it was called Marah.
Context
22 Moses led Israel onward from the Red Sea, and they went out into the wilderness of Shur; and they went three days in the wilderness, and found no water.
23 When they came to Marah, they couldn’t drink from the waters of Marah, for they were bitter. Therefore its name was called Marah.
24 The people murmured against Moses, saying, “What shall we drink?”