Summary
After departing from the wilderness of Sin, the Israelites camped at Rephidim where they found no water. They complained to Moses, who turned to God for guidance. God instructed Moses to strike a rock, and water flowed, allowing the people to drink. Moses named the place Massah and Meribah, signifying their test of faith. Later that day Amalek attacked Israel, and Moses called upon Joshua to fight while he positioned himself on a hill with his staff. When Moses lifted his hands, Israel won; when he lowered them, Amalek prevailed. Aaron and Hur supported his hands until sunset. Moses recorded the event, built an altar named Jehovahnissi, and promised God would forever remember Amalek as an enemy of Israel.