Then came Amalek, and fought with Israel in Rephidim.

And Moses said to Joshua, Choose us out men, and go out, fight with Amalek: to-morrow I will stand on the top of the hill with the rod of God in my hand.

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.

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

And Joshua discomfited Amalek and his people with the edge of the sword.

And the LORD said to Moses, Write this for a memorial in a book, and rehearse it in the ears of Joshua: for I will utterly blot out the remembrance of Amalek from under heaven.

For he said, Because the LORD hath sworn that the LORD will have war with Amalek from generation to generation.