Exodus 17:11

And when Moses lifted up his hands, Israel prevailed. But when he released them a little while, Amalek overcame

Other versions

King James Version

And it came to pass, when Moses held up his hand, that Israel prevailed: and when he let down his hand, Amalek prevailed.

English Standard Version

Whenever Moses held up his hand, Israel prevailed, and whenever he lowered his hand, Amalek prevailed.

New International Version

As long as Moses held up his hands, the Israelites were winning, but whenever he lowered his hands, the Amalekites were winning.