Exodus 17:13-16

AKJV(i) 13 And Joshua discomfited Amalek and his people with the edge of the sword. 14 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 put out the remembrance of Amalek from under heaven. 15 And Moses built an altar, and called the name of it Jehovahnissi: 16 For he said, Because the LORD has sworn that the LORD will have war with Amalek from generation to generation.