So Moses said to Joshua, “Choose men for us and go out, fight against Amalek. Tomorrow I will station myself on the top of the hill with the staff of God in my hand.”

‘Call to Me and I will answer you, and I will tell you great and mighty things, which you do not know.’

Then

I shattered them, so that they were not able to rise;
They fell under my feet.

When evildoers came upon me to devour my flesh,
My adversaries and my enemies, they stumbled and fell.

So when He said to them, “I am He,” they drew back and fell to the ground.

For

The Lord of hosts is with us;
The God of Jacob is our stronghold. Selah.

“Be broken, O peoples, and be

shattered;

And give ear, all remote places of the earth.
Gird yourselves, yet be shattered;
Gird yourselves, yet be shattered.

What then shall we say to these things? If God is for us, who is against us?

General references

So it came about when Moses held his hand up, that Israel prevailed, and when he let his hand down, Amalek prevailed.