The Israelites journey from the wilderness of Sin to Rephidim, Exo 17:1, where they murmur for lack of water, Exo 17:2, Exo 17:3. Moses asks counsel of God, Exo 17:4, who commands him to take his rod and smite the rock, Exo 17:5, and promises that water should proceed from it for the people to drink, Exo 17:6. The place is called Massah and Meribah, Exo 17:7. The Amalekites attack Israel in Rephidim, Exo 17:8. Joshua is commanded to fight with them, Exo 17:9. Moses, Aaron, and Hur go to the top of a hill, and while Moses holds up his hands, the Israelites prevail; when he lets them down, Amalek prevails, Exo 17:10, Exo 17:11. Moses, being weary, sits down, and Aaron and Hur hold up his hands, Exo 17:12. The Amalekites are totally routed, Exo 17:13, and the event commanded to be recorded, Exo 17:14. Moses builds an altar, and calls it Jehovah-Nissi, Exo 17:15. Amalek is threatened with continual wars, Exo 17:16.