Exodus 17:14-16

14Adonai said to Moses, “Write this for a memorial in the book, and rehearse it in the hearing of Joshua, for I will utterly blot out the memory of the Amalekites from under heaven.”

15Then Moses built an altar, and called the name of it Adonai-Nissi.

16Then he said, “By the hand upon the throne of Adonai, Adonai will have war with Amalek from generation to generation.”