In Context

10 And Joshua doth as Moses hath said to him, to fight with Amalek, and Moses, Aaron, and Hur, have gone up to the top of the height;

11 and it hath come to pass, when Moses lifteth up his hand, that Israel hath been mighty, and when he letteth his hands rest, that Amalek hath been mighty.

12 And the hands of Moses are heavy, and they take a stone, and set it under him, and he sitteth on it: and Aaron and Hur have taken hold on his hands, on this side one, and on that one, and his hands are stedfast till the going in of the sun;

13 and Joshua weakeneth Amalek and his people by the mouth of the sword.

14 And Jehovah saith unto Moses, 'Write this, a memorial in a Book, and set it in the ears of Joshua, that I do utterly wipe away the remembrance of Amalek from under the heavens;'

15 and Moses buildeth an altar, and calleth its name Jehovah-Nissi,

Exodus 17:13 in Other Translations