Exodus 17:9-11

21st Century King James Version

⁹ And Moses said unto Joshua, “Choose us out men, and go out, fight with Amalek. Tomorrow I will stand on the top of the hill with the rod of God in mine hand.”

¹⁰ So Joshua did as Moses had said to him, and fought with Amalek; and Moses, Aaron, and Hur went up to the top of the hill.

¹¹ And it came to pass, when Moses held up his hand, that Israel prevailed; and when he let down his hand, Amalek prevailed.