Marah

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.

And they journeyed from before Hahiroth, and passed through the midst of the sea into the wilderness: and they went three days’ journey in the wilderness of Etham, and encamped in Marah.

And they journeyed from Marah, and came unto Elim: and in Elim were twelve springs of water, and threescore and ten palm-trees; and they encamped there.