9 And Moses said to Joshua, "Choose us some men and go out, fight with Amalek. Tomorrow I will stand on the top of the hill with Ex. 4:20the rod of God in my hand." 11 And so it was, when Moses (James 5:16)held up his hand, that Israel prevailed; and when he let down his hand, Amalek prevailed. 12 But Moses’ hands became heavy; so they took a stone and put it under him, and he sat on it. And Aaron and Hur supported his hands, one on one side, and the other on the other side; and his hands were steady until the going down of the sun. 13 So Joshua defeated Amalek and his people with the edge of the sword.
15 And Moses built an altar and called its name, The-Lord-Is-My-Banner;