Exodus 17:13-15
Exodus 17:13-15 ASV
And Joshua discomfited Amalek and his people with the edge of the sword. and Jehovah said unto Moses, Write this for a memorial in a book, and rehearse it in the ears of Joshua: that I will utterly blot out the remembrance of Amalek from under heaven. And Moses built an altar, and called the name of it Jehovah-nissi