17 wAll the congregation of the people of Israel moved on from the wilderness of Sin by stages, according to the commandment of the Lord, and camped at Rephidim, but there was no water for the people to drink. 2 xTherefore the people quarreled with Moses and said, “Give us water to drink.” And Moses said to them, “Why do you quarrel with me? Why do you ytest the Lord?” 3 But the people thirsted there for water, and zthe people grumbled against Moses and said, “Why did you bring us up out of Egypt, to kill us and our children and our livestock with thirst?” 4 So Moses cried to the Lord, “What shall I do with this people? They are almost ready ato stone me.” 5 And the Lord said to Moses, “Pass on before the people, taking with you some of the elders of Israel, and take in your hand the staff with bwhich you struck the Nile, and go. 6 cBehold, I will stand before you there on the rock at Horeb, and you shall strike the rock, and water shall come out of it, and the people will drink.” And Moses did so, in the sight of the elders of Israel. 7 And he called the name of the place dMassah1 and eMeribah,2 because of the quarreling of the people of Israel, and because they tested the Lord by saying, “Is the Lord among us or not?”
8 fThen Amalek came and fought with Israel at Rephidim. 9 So Moses said to gJoshua, “Choose for us men, and go out and fight with Amalek. Tomorrow I will stand on the top of the hill with hthe staff of God in my hand.” 10 So gJoshua did as Moses told him, and fought with Amalek, while Moses, Aaron, and iHur went up to the top of the hill. 11 Whenever Moses jheld up his hand, Israel prevailed, and whenever he lowered his hand, Amalek prevailed. 12 But Moses’ hands grew weary, so they took a stone and put it under him, and he sat on it, while Aaron and iHur held up his hands, one on one side, and the other on the other side. So his hands were steady until the going down of the sun. 13 And gJoshua overwhelmed Amalek and his people with the sword.
14 Then the Lord said to Moses, “Write this as a memorial in a book and recite it in the ears of gJoshua, that kI will utterly blot out the memory of Amalek from under heaven.” 15 And Moses lbuilt an altar and called the name of it, The Lord Is My Banner, 16 saying, “A hand upon the throne3 of the Lord! kThe Lord will have war with Amalek from generation to generation.”
Massah means testing
Meribah means quarreling
A slight change would yield upon the banner