But only through the aid of Moses, did Joshua with his victory. Moses did not go out into battle, but through his prayer and through his influence upon the people in inspiring them with faith, the battle was won. While the battle raged between Israel and Amalek, Moses was stationed on a height, where, supported by the Levite Aaron and the Judean Hur, the representatives of the two noble tribes Levi and Judah, he fervently implored God's aid.
He said: "O Lord of the world! Through me has Thou brought Israel out of Egypt, through me hast Thou cleft the sea, and through me has Thou wrought miracles; so do Thou now work miracles for me, and lend me victory to Israel, for I well know that while all other nations fight only to the sixth hour of the day, this sinful nation stand in battle ranks till sunset." Moses did not consider it sufficient to pray alone to God, but he raised his hands toward heaven as a signal for the whole nation to follow his example and trust in God.
As often as he then raised his hands to heaven and the people prayed with him, trusting that God would lend them victory, they were indeed victorious; as often, however, as Moses let down his hands and the people ceased prayer, weakening in their faith in God, Amalek conquered. But it was hard for Moses constantly to raise his hands. This was God's way of punishing him for being somewhat negligent in the preparations for the war against Amalek.
Hence Aaron and Hur were obliged to hold up his arms and assist him in his prayer. As, furthermore, he was unable to stand all that time, he seated himself on a stone, disdaining a soft and comfortable seat, saying, "So long as Israel is in distress, I shall share it with them."