Exodus 17:8-13

At Rephidim the Amalekites came and fought against the Israelites. So Moses said to Joshua, “Choose some men and go and fight the Amalekites tomorrow. I will stand on the top of the hill and watch you. I will be holding the walking stick God gave me.” Joshua obeyed Moses and went to fight the Amalekites the next day. At the same time Moses, Aaron, and Hur went to the top of the hill. Any time Moses held his hands in the air, the men of Israel would start winning the fight. But when Moses put his hands down, the men of Israel began to lose the fight. After some time, Moses’ arms became tired. So they put a large rock under Moses for him to sit on. Then Aaron and Hur held Moses’ hands in the air. Aaron was on one side of Moses and Hur was on the other side. They held his hands up like this until the sun went down. So Joshua and his men defeated the Amalekites in this battle.