5 The Lord answered Moses: Go on ahead of the people, and take along with you some of the elders of Israel, holding in your hand, as you go, the staff with which you struck the Nile.
6 I will be standing there in front of you on the rock in Horeb. Strike the rock, and the water will flow from it for the people to drink. Moses did this, in the sight of the elders of Israel.
7 The place was named Massah and Meribah, because the Israelites quarreled there and tested the Lord, saying, “Is the Lord in our midst or not?”
8 Then Amalek came and waged war against Israel in Rephidim.
9 So Moses said to Joshua, “Choose some men for us, and tomorrow go out and engage Amalek in battle. I will be standing on top of the hill with the staff of God in my hand.”
10 Joshua did as Moses told him: he engaged Amalek in battle while Moses, Aaron, and Hur climbed to the top of the hill.
11 As long as Moses kept his hands raised up, Israel had the better of the fight, but when he let his hands rest, Amalek had the better of the fight.