Viewing verse 16 of Exodus 17 (with context)
Read Full Chapter And Joshua discomfited Amalek and his people with the edge of the sword.
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.
And Moses built an altar, and called the name of it Jehovah-nissi:
For he said, Because the LORD hath sworn that the LORD will have war with Amalek from generation to generation.