Marah: The First Station of the Israelites, where Moses Made the Bitter Waters Sweet
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Exodus 15:22–25
Then Moses led Israel from the Red Sea, and they went out into the Desert of Shur. For three days they walked in the desert without finding water. / And when they came to Marah, they could not drink the water there because it was bitter. (That is why it was named Marah.) / So the people grumbled against Moses, saying, “What are we to drink?”
Numbers 33:8, 9
They set out from Pi-hahiroth and crossed through the sea, into the wilderness, and they journeyed three days into the Wilderness of Etham and camped at Marah. / They set out from Marah and came to Elim, where there were twelve springs and seventy palm trees, and they camped there.