Marah

They arrived at Marah but couldn't drink the water there, because it was bitter. This is why they called it Marah [bitterness].

They moved on from P'nei-Hachirot, passed through the sea to the desert, continued three days' journey into the Etam Desert and camped at Marah.

They moved on from Marah and came to Eilim; in Eilim were twelve springs and seventy palm trees, so they camped there.