Some battles are won by the people swinging the swords. The strangest battle in the book of Exodus was not. It was won by an eighty-year-old man on a hilltop who could not keep his arms in the air!
A Battle Decided on the Hilltop
In Exodus 17, Israel is attacked in the wilderness by the Amalekites. Joshua leads the army into the valley, and Moses climbs the hill overlooking the fight, holding the staff of God. And then the Bible gives us one of the most vivid pictures of prayer ever written: when Moses held up his hands, Israel prevailed. When his arms dropped, Amalek prevailed (Exodus 17:11). The battle in the valley was being decided on the hill!
Moses got tired. Of course he did! So Aaron and Hur sat him on a stone and held up his arms, one on each side, until sunset, and Joshua won the battle. And afterward Moses built an altar and named it "Jehovah Nissi", The Lord Is My Banner (Exodus 17:15).
What a Banner Is For
In ancient warfare the banner was the tall standard lifted above the army. Soldiers could not hear orders over the noise of the fight, but they could look up. The banner told you where your king was. It told you the fight was still on. It told you which way to rally when everything around you was chaos.
Moses was not saying his staff won the battle, and he certainly was not saying his arms did. He was saying: the thing lifted over this army, the thing we look up at in the middle of the noise, is the Lord Himself. Centuries later Isaiah picked up the same picture and pointed it forward, promising a root of Jesse who would stand "for an ensign of the peoples" (Isaiah 11:10). Jesus said it about Himself: "And I, if I be lifted up from the earth, will draw all men unto me" (John 12:32). The Lord is still the banner!
The Battle You Did Not Pick
It matters where this fight happened. Israel was at Rephidim, which was the place where the water ran out and the people were at each other's throats (Exodus 17:1-7). Amalek did not attack the front of the column where the fighters were. Deuteronomy tells us they came at the rear, at the ones who were "faint and weary", the stragglers (Deuteronomy 25:17-18). That is how the enemy still fights! He does not usually attack you at your strongest point on your best week. He waits for the season when the water ran out.
Which is exactly why the banner matters. Nobody schedules their battles. You do not get to pick the week the diagnosis comes, or the month the marriage buckles, or the season your faith feels thin. What you get to pick is what you look up at in the middle of it. Soldiers in the noise of a fight could not hear orders. They could see the standard. Jehovah Nissi is the name for people who cannot hear anything over the noise right now but can still look up!
Nobody Holds Their Own Arms Up
Here is the part of this story I love the most: Moses could not do it alone. The man who parted the Red Sea needed two friends and a rock to sit on! If the great intercessor of the Old Testament needed his arms held, what makes us think we can fight our battles with private, occasional, solo prayer?
Somebody reading this is in the valley right now, and the honest truth is your arms are down. This is what the church is for. Ask two people to hold your arms up this week. Actually ask! And if your own battle is quiet at the moment, look around: whose arms have been drooping? Being Aaron in someone else's war is some of the most important work a believer ever does.
Amalek Comes Back
One more thing this passage refuses to sugarcoat: the chapter ends by saying the Lord will have war with Amalek "from generation to generation" (Exodus 17:16). This was not the last battle. Amalek shows up again in the days of the judges, again in the days of Saul, again in the story of Esther. Some enemies are not defeated once. They are defeated repeatedly!
You probably know an Amalek like that. The temptation that circles back every few years. The old resentment that finds a new reason. The fear that goes quiet and then returns in a new uniform. Do not be discouraged that it came back. Its coming back does not mean the last victory was fake. It means you raise the banner again. The name is not Jehovah Nissi, "The Lord Was My Banner, That One Time". It is present tense, standing, permanent.
Raise the Banner Again
Build the altar after the battle, too. Moses did not just win and move on; he made a marker so a whole nation would remember how that fight was actually won. And notice what God commanded in the very next breath: "Write this for a memorial in a book" (Exodus 17:14). Write it down! God did not trust that victory to memory, and neither should we.
When God carries you through a season, say so, out loud, in front of people. That is what a testimony is: an altar with your name on it, and His name over it. Revelation says the saints overcame "by the blood of the Lamb, and by the word of their testimony" (Revelation 12:11). Your written-down battle is a weapon in somebody else's war. If you have one, tell it.