Exodus 17:15 in the King James Version
And Moses built an altar, and called the name of it Jehovah-nissi:
Context
14 The LORD said to Moses, “Write this for a memorial in a book, and rehearse it in the ears of Joshua: that I will utterly blot out the memory of Amalek from under the sky.”
15 Moses built an altar, and called its name “The LORD our Banner”.
16 He said, “The LORD has sworn: ‘The LORD will have war with Amalek from generation to generation.’”