At Rephidim, Amalek came and fought against Israel.

Moses said to Joshua, “Select some men for us and go fight against Amalek. Tomorrow I will stand on the hilltop with God’s staff in my hand.”

Joshua did as Moses had told him, and fought against Amalek, while Moses, Aaron, and Hur went up to the top of the hill.

While Moses held up his hand, Israel prevailed, but whenever he put his hand down, Amalek prevailed.

So Joshua defeated Amalek and his army with the sword.

The Lord then said to Moses, “Write this down on a scroll as a reminder and recite it to Joshua: I will completely blot out the memory of Amalek under heaven.”

He said, “Indeed, my hand is lifted up toward the Lord’s throne. The Lord will be at war with Amalek from generation to generation.”