Exodus 17:9-11

Revised Standard Version

⁹ And Moses said to Joshua, “Choose for us men, and go out, fight with Am′alek; tomorrow I will stand on the top of the hill with the rod of God in my hand.” ¹⁰ So Joshua did as Moses told him, and fought with Am′alek; and Moses, Aaron, and Hur went up to the top of the hill. ¹¹ Whenever Moses held up his hand, Israel prevailed; and whenever he lowered his hand, Am′alek prevailed.