Then came Amalek, and fought with Israel in Rephidim.
And the LORD said unto Moses, Write this for a memorial in a book, and rehearse it in the ears of Joshua: for I will utterly put 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.
Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.