Exodus 17:10-12

ECB(i) 10 So Yah Shua works as Mosheh says to him and fights Amaleq: and Mosheh, Aharon and Hur ascend to the top of the hill: 11 And so be it, when Mosheh lifts his hand, Yisra El prevails mightily: and when he rests his hand, Amaleq prevails mightily: 12 and the hands of Mosheh get heavy; and they take a stone and put it under him and he sits thereon; and Aharon and Hur uphold his hands - the one on this side and the one on that side; and his hands are trustworthy until the going down of the sun.