In Exodus 17, the Israelites complained again to Moses. They grumbled about the lack of water and Moses responded, "Why do you put the Lord to the test?". The Lord told Moses to take his staff and strike the rocks and water came out for the people to drink. The Lord provided for them again and continued to be faithful to His people. When the Amalekites came and attacked, Moses sent Joshua with his men to fight them. Then Moses went up to the top of a hillside and held up his hands towards God, trusting in Him again for deliverance. As long as Moses held up his hands, the Israelites prevailed and were winning the battle with the Amalekites, so Aaron and Hur held up his arms when he grew tired, so that his hands remained steady until Joshua overcame the Amalekite army. Afterwards, Moses recorded the battle account on a scroll as something to be remembered and also built an alter, calling it "The Lord is my Banner", for "hands were lifted up to the throne of the Lord".