Exodus
Chapters 17:12-16
Revised Version 1885
12But Moses' hands were heavy; and they took a stone, and put it under him, and he sat thereon; and Aaron and Hur stayed up his hands, the one on the one side, and the other on the other side; and his hands were steady until the going down of the sun.
13And Joshua discomfited Amalek and his people with the edge of the sword.
14And the Lord 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.
15And Moses built an altar, and called the name of it Jehovah-nissi:
16and he said, The Lord hath sworn: the Lord will have war with Amalek from generation to generation.