Exodus 17:11-13

New Revised Standard Version Updated Edition

¹¹ Whenever Moses held up his hand, Israel prevailed, and whenever he lowered his hand, Amalek prevailed. ¹² But Moses’s hands grew heavy, so they took a stone and put it under him, and he sat on it. Aaron and Hur held up his hands, one on either side, so his hands were steady until the sun set. ¹³ And Joshua defeated Amalek and his people with the sword.