And the name of the place was called Massah, and Meribah, because of the striving of the children of Israel, and because they tried HaShem, saying: 'Is HaShem among us, or not?'
Then came Amalek, and fought with Israel in Rephidim.
And Moses said unto Joshua: 'Choose us out men, and go out, fight with Amalek; tomorrow I will stand on the top of the hill with the rod of G-d in my hand.'
So Joshua did as Moses had said to him, and fought with Amalek; and Moses, Aaron, and Hur went up to the top of the hill.
And it came to pass, when Moses held up his hand, that Israel prevailed; and when he let down his hand, Amalek prevailed.
But Moses' hands were heavy; and they took a stone, and put it under him, and he sat thereon; and Aaron and Hur stayed up his hands, the one on the one side, and the other on the other side; and his hands were steady until the going down of the sun.
And Joshua discomfited Amalek and his people with the edge of the sword.
And HaShem said unto Moses: 'Write this for a memorial in the book, and rehearse it in the ears of Joshua: for I will utterly blot out the remembrance of Amalek from under heaven.'
And Moses built an altar, and called the name of it Adonai-nissi.
And he said: 'The hand upon the throne of HaShem: HaShem will have war with Amalek from generation to generation.'