Why Moses Held His Arms Up During Battle

There is a battle in the Book of Exodus that baffles everyone who reads it carefully. Israel is fighting Amalek at Rephidim. Moses stands on a hilltop, arms raised. While his hands are up, Israel wins. The moment his arms drop, Amalek surges forward. Aaron and Hur position themselves on either side, holding up his arms until sunset. Israel prevails. End of story.

Or so it seems. The Mekhilta DeRabbi Yishmael, one of the oldest tannaitic midrashim on Exodus composed in the school of Rabbi Ishmael, circa the 2nd century CE, asks the obvious question: what exactly were Moses' hands doing? Were they wielding some kind of weapon? Was this a gesture of command? Rabbi Eliezer of the Mekhilta offers an answer that reframes the entire episode. "Whenever Moses would raise his hands heavenward," he teaches, "Israel strengthened themselves in words of Torah, which were destined to be given by his hands. And whenever he lowered his hands, Israel weakened in words of Torah." The physical gesture was not directing the soldiers below. It was a mirror of something else entirely.

Read that again slowly. The war at Rephidim was being fought on two planes simultaneously. In the valley, swords met swords. On the hilltop, the fate of revelation was being rehearsed. Every time Moses pointed toward heaven, the people below were reminded of what they were fighting toward: the moment, not far off, when those same hands would receive the Torah from God at Sinai. The battle was never really about Amalek. It was about whether Israel could hold the weight of what was coming.

This reading unlocks a second scene that sits quietly in the Book of Exodus, waiting to be connected to this one. In Exodus 24, before Moses ascends Sinai to receive the tablets, God calls Aaron, Nadab, Abihu, and seventy elders of Israel to climb partway up the mountain. There, in one of the most astonishing passages in the entire Torah, they behold the God of Israel. Beneath the divine feet lies what the Torah describes as a pavement of sapphire, as clear as the sky itself. And then the text delivers its most startling line: "they beheld God, and they ate and drank" (Exodus 24:11).

They ate and drank. In God's presence. Without being destroyed. The medieval commentator Rashi suggests that this audacity was actually a transgression, a glimpse into something that should have cost them their lives, and that God delayed the punishment so as not to overshadow the joy of receiving the Torah. But beneath the tension in Rashi's reading lies the same question the Mekhilta is wrestling with at Rephidim: what happens when ordinary human beings are brought into proximity with the source of revelation?

At Rephidim, the answer is: they need a man who can hold his hands up. The seventy elders needed to see the sapphire pavement to believe that what Moses was about to bring down was true. The people in the valley needed the sight of Moses' raised arms to keep fighting. None of them could hold the weight alone. Not the elders. Not the soldiers. Not even Moses, whose arms literally failed and had to be supported by two other men.

The Mekhilta, working through these texts in the 2nd century CE, understood that Torah is not a private acquisition. It belongs to the people who hold it up for each other. Moses' arms were raised, but Aaron and Hur held them there. The elders beheld the divine, but they were seventy, not one. The very structure of revelation at Sinai was communal: one mountain, one nation, one declaration spoken in the voice of fire.

What the rabbis found when they pressed on these two stories is a single theological claim woven into both of them. The hands that eventually wrote the Torah onto stone were the same hands raised in prayer during a desert battle. The eyes that beheld the sapphire pavement were connected to the same question the soldiers at Rephidim were asking with their bodies: is there something on the other side of all this worth fighting for? The Mekhilta says yes. The elders came down from the mountain and ate and drank. The soldiers in the valley held their ground until the last light failed.

And Moses' arms stayed raised, not because he was strong, but because two men loved him enough to hold them there. In the Mekhilta's reading, that is what Torah looks like before it arrives: heavy, impractical, requiring more hands than any one person has.