At Rephidim, they can find no water to drink, and angrily demand that Moses give them water. Moses, fearing they will stone him, calls on Jehovah for help and is told to command a certain "rock in Horeb," in God's name which causes a stream to flow from it, providing ample water for the people. He names the place Massah (meaning 'testing') and Meribah (meaning 'quarreling').[1]